But what about woman of steel, man of Kleenex?

Well, we need not conceptualize fertilization as “boy sperms overpower girl ova”. How about Supergirl’s ova change their surface chemistry when they find the right sperm and invite the fellow in, sealing the surface again behind him faster than a speeding bullet?

I think that’s more the way it happens, you know…

So we’re assuing that Supergirl is straight?

With all the times that she and Wonder Woman have gotten it on* I’m not so sure. She is probably bi.

*in my head

Of course since Supergirl literally could suck a golf ball through a garden hose, I think we’re in trouble.

If by trouble you mean awesome.

Cecil has covered the subject of penile fracture, which seems to me the most likely outcome.

Having once suffered a mild, non-ER-worthy instance of same, I can only offer my pre-emptive condolences to the poor schmo who gets “lucky” with Wonder Woman.

Well, I did read an erotic fanfic once that mentioned She-Hulk’s sexual frustration due to the inability of normal men to penetrate her. Enter : Power Man ( literally ).

Which of course, is the solution. Just haul the human boyfriend over to the nearest mad scientist and power him up.

According to Wikipedia, the spermatozoon penetrates an outer layer, then releases enzymes that dissolve a spot in the next layer, after which a chemical reaction renders the ovum impenetrable to other sperm. So it seems that the chemicals released by the sperm are important. If Supergirl’s eggs are as impenetrable as her bulletproof skin, fertilization by mere human sperm ain’t gonna do anything.

Which makes you wonder how many socks got holes eaten through them by teenaged Clark Kent’s semen. I’m not a comic book reader - was this ever addressed in a flashback or anything? I’m imagining it must have come up at some point.

Better still . . .

The big fallacy of these arguments is the assumption that all of Superman/Supergirl’s systems work in a matter analogous to his gross physical strength and invulnerablility. That need not be the case.

For example, Superman is invulnerable to radiation (excluding kryptonite, of course). Yet he can see. In fact, he can see much much better than a normal human. Light can pass through his cornea and lens, and can react with his retina, but it cannot burn or blind him. In the same way, I’d expect that a sperm would be able to permeate Supergirl’s ova (in fact, I’d wager that her ova would remain viable much longer than a normal female’s, and she’d likely be immune to chemical birth control, so wear a rubber, guys).

What I’m trying to say is that while empowered Kryptonians are resistant to injury, it doesn’t follow that they’re resistant to non-injurious manipulation. Supergirl’s vagina would be elastic enough to accomidate a penis, but wouldn’t stretch beyond that, to the point it was hurting her (so if Comet was hung like a horse, he may be out of luck). The hymen would remain a difficulty. If Supergirl wished to enjoy vaginal sex, she’s have to employ magic (a certain Mr. Batson would be happy to oblige), have it cut ahead of time by a gynecologist using a kryptonite scalpel, or simply another person of like strength, such as a randy Daxamite.

The part of the argument that remains convincing is that involuntary muscular contractions (vaginal contractions, ejaculation, labor, etc.) would have analogous strength to a Kryptonian’s concious muscular movements. This is given creedence by several incidence in which a super-sneeze erupts with hurricane force and the like. However, that was pre-crisis.

Post-crisis, Kryptonian powers have been explained as largely psionic in origin. Strength and flight becomes an extremely low-range form of telekinesis, telescopic vision a form of remote viewing, etc. It does not necessarily follow that a kryptonian would endow his or her autonomous systems with the strength. If they did, through practicing biofeedback, they could learn not to. Recently, Superman lost his powers for an entire year, and he suggests that he unconciously willed the powers not to return for that period because he enjoyed being human. He could therefore, with training, learn to turn some or all of his powers off.

Or else they could just do it under a red sun lamp. That’s the easiest solution.

Unless you have magical spunk you know the kind that would hit Kennedy’s throat, go through the seat in front of him, make a left turn, go through Connolly’s wrist, turn downwards and plany itself in his left thigh you’ve got a shit ton of work ahead of you, brother. And it’s not a task I’d shy away from either. If you could make Supergirl have an orgasm, you should get a Nobel Peace prize.
waitaminit…what if she’s a squirter…you might get a hole burned through your head from the pressure…again…not a bad way to go…leave it to us guys to think of this shit, eh?

Bolding mine.

“Order up! Who ordered the baked vagina with extra cheese?”

Remove the words ‘golf’ and ‘garden’ from my previous post.

Suppose (pre-Crisis) Superman and/or Supergirl decides survival of the Kryptonian humanoid species is more important than his/her superhero career. He/she is voluntarily exposed to gold kryptonite – superpowers erased. He/she can now have sex with a Terran human without fear of causing injury. Conception might even result. But . . . would the offspring be superpowered or not?

In short, then, it’s probably best to work one’s mojo on Mary Marvel, who can at least transform into an actual human woman for coitus.

As long as one remembers not to use “Shazam” as any kind of safeword, that is.

There was, as one might expect, an Imaginary Story that dealt with this very subject. Pre-Crisis Superman had married Lois Lane and lost his powers due to gold K (I can’t remember whether it was voluntary, accidental or another of Luthor’s attempts to kill Superman.)

Anyway, Clark and Lois had a baby, and yup, the baby had superpowers. The fanwankers (even pre-Crisis, even for an Imaginary Story, there were fanwankers) decided that was okay because exposure to gold K didn’t alter Superman’s genetics.

No, it didn’t mention what happened if Lois tried to breastfeed the kid.

Or just break it with her own fingers. Can’t a human woman do that?

To quote Niven’s essay on that idea :

Just a thought, here…Superman’s not COMPLETELY invulnerable, right? I mean, when he fought Doomsday, he ended up bleeding (though probably at the point that any other being would have been ground into a fine powder). Kinda harkening back to the old days where “only an exploding shell could pierce his skin.”

What I’m saying, is…what if Kryptonian invulnerability “scales down”? So, to a single cell (like an Ovum), perhaps a single Sperm might have the proportional speed and strength of a monster like Doomsday.

You do realize that this kind of thread could, pretty much by definition, only be read by people completely unable to answer that question, right?

:smiley: :wink:

That was my point. Of course she can.

Also - why don’t Superman and Supergirl just get it on? Lois Lane’s not worth it anyway.

If they have to go with humans, can’t they restrain their own force?