Some gays like hypertrophied (over-muscled) men, while I have never met a woman who does not claim to find that look repulsive. As to penis size: large ones seem to be an obsession with gays, while most women only find them a nice benefit, but not the sole object of lust.
And in the cases you cite, men isolated on ships, I doubt that most men would be interested in another man's genitals, they might fantasize about the other man being a woman. Gays seem to be obsessed with male genitalia.
In praise of alpha males: http://www.freerepublic.com/focus/f-news/2584612/posts
Well, you discount the leather-clad, Ernst Roehm Nazi style of faggot.
A gay friend of mine—who had been a practicing heterosexual for some years told me:
Men generally have a more rampant, indiscrimnate sex drive than females..they will do it pretty much with anybody, given the choice. They don’t necessarily complicate it with emotional bonding which most women ( whether they admit it or not) want.
With gay guys, you can have ‘no strings’ unattached sex with as many, as much as you want-they all want the ‘act’ too. Nobody necessarily gets their feelings hurt. Even when in a ‘committed’ relationship, lots of gay men have “open” recreational sex with other gays.