There comes a time in some love affairs, Honey, when you really must learn to let it go.
To answer the question from another point of view:
The penis is pretty darn resistant to compression forces. There are cases of penises “snapping” due to some kind of sideways force, but none that I know of due to crushing/squeezing force. Even your hand is not strong enough to crush a penis, and I can’t imagine pelvic muscles are stronger than that.
Thanks for curing my potence problem.
“Penis Snappers” would make an excellent all-girl heavy metal band name.
Does this lead to the explanation why there is no floyd ?
Sounds like a painful way for him to go. 
I don’t consider an anonymous and rather implausible sounding story submitted to a sex advice column to be proof that this can “definitely” happen.
I’ve heard of somone so uptight that if you stuck a piece of coal up his ass, you’d come out with a diamond.
We’ve heard your theories before, Lex.
They say the sphincter is the second-strongest muscle in the body; and the jaw is the strongest. I guess some guys are just really into challenges, so to speak.
This. You can squeeze your cock as hard as you can 'til you turn blue, and it won’t hurt it.
So the answer to the OP’s question is a resounding NO.
You’re just trying to make me try it, and it ain’t gonna work, uh-uh.
But if it turns blue, it will look like you got cold-cocked.
What about oral?
I’m sure penises are a little bit stronger than hot dogs or sausages. How easy or possible would it be to just bite it off? How big a difference would “erect versus flaccid” make?
[QUOTE=Roberta]
I mean, I had mine removed surgically under general anesthesia. But to have it bitten off in a Buick…
[/QUOTE]
…
The experiment has been tested:
hey would this account for the disproportionately high % of non-menstruating women bleeding after I’ve, uh, plumbed their depths? I ain’t particularly longer than average, but have been told a few times that I am thicker (wider? girthier?). “You’re a kielbasa when I’m used to hotdogs”, was 1 comment.
Seriously, a few have told me they were unusually sore, and to my shock (and somewhat disdain), I’ve pulled the drill out of the well to notice blood. I specifically avoid drilling when a woman is ‘paying the monthly bill’. So is the unusual high number of slightly bleeding vages due to their walls clenching?
Man, that is some sick shit. 
Strong vaginal muscles can compress (temporarily reduce diameter) an erect penis, and can make the penis ache/feel uncomfortable from the pressure/friction, but a vagina cannot crush a penis.
Probably could a zombie.
I will have occasion to cite profoundly on this question as soon as I resurrect my evolution of dick-inflation thread. The hydrostatics of a stiffy are pretty well defined.
Also, as mentioned in a similar case upthread, only once, due to some weird coincidence of thrusting, did I contact the lip of a woman’s cervix penicularly–if I were boasting I’d say it happened regularly–and it hurt her like hell.
Apparently someone has never met Bangkok Lily.