Well, there you have it guys. If you are behind three women: one with long red hair, the next with long dark curly hair, the last with long, straight dark hair, you should probably take a gander from another angle. We aren’t going to budge on this one. And if any long haired blonds age 30+ would like to join us, we’ll be over on aisle 7, shopping for products to make our inappropriately long hair look even shinier and more lustrous, just to spite you.
So you’re only incidentally homosexual, then?
The face/back-of-head discussion only has me thinking of the time Niles knocked boots with Lilith and Frasier found out.
From personal experience, in regards the OP, the number of times I’ve observed a dreamboat body turn around to reveal a shipwreck face probably outnumbers the times they’ve matched up nicely.
I suppose so. Maybe that is what “bisexual” really means. You are attracted to some guy’s backs but no the fronts.
Most of the time a person who looks good from behind will look good up front, but I have been fooled on occasion, usually in that the person will turn out to be older than I expected her to be. The worst is when the person turns out to be a DUDE! (cue up “Dude Looks Like a Lady”). Few things will squick a heterosexual guy out like expending sexual energy on what turns out to be a man.
Also know as the “Donatella Versace Syndrome” 
VCNJ~
Alright, so that’s the end of that theory.
Like Diogenes said, there are a lot of cues you can pick up without seeing a face. Good genes and development in one area are likely to hold true for the rest, too. At least one study (PDF) indicates that you can tell how attractive someone is without even seeing the person.
Not a problem. Space is curved. Just stand still and look in one direction for a r-e-a-l-l-y long time.
Yes! Yes! Yes! 
One of the most beautiful women I’ve ever met was in her fifties and had long shining silber hear. She was an extremely cool lady. (And a Wiccan high priestess, which raised the coolness factor even more…)
Yeah, who says you have to cut your hair short when you get older? Personally, I hate those mannish-looking haircuts older women are often seen sporting. (I think that would be my entry to the “What does giving up look like to you?” thread).
Heh.
I get the impression that some of you thought I was against the idea of older women with long hair. Far from it! The woman I mentioned in my post looked like she was twenty-something, and dressed the part. Except she was fifty-something and wrinkly and highly unattractive from the front. Sort of a case of false advertising. Or maybe delusion.
My Grandma told her daughter-in-law (Mom) this regularly. Mom’s dream is to have hair like Lillian Gish in The Whales of August. She’s pretty close, just some dark hair to wait out. But if you look at 40s movies, even the young attractive women wore short, “set” hair. So Grandma just kept doing her hair that way.
I sport a mannish 'do but it suits me OK. And it was a free choice.
Actually, the first thing that came to mind was from Gilbert and Sullivan’s Trial by Jury.
I think one reason you can often tell is because attractiveness isn’t purely - or even mostly - about facial features. We all know at least one person who’s got beautiful features but absolutely no sex appeal, and one who’s a total babe even though he or she has a face like a horse with thyroid problems. Attractiveness is made up of energy, personality, style, body shape, posture, walk, confidence, charisma, a whole bunch of things…and most of those show just as much from the back as from the front.