I admit to crotch watching. Too bad most guys wear baggy/saggy clothes these days, tight jeans are always the best way for a hot guy to flaunt his assets.
For males as a whole, we are very visual, so finding that men, gay or straight, crotch watch is not surprising. But I do think women are better at being discrete about it, so they may have been underated.
Do women check other women's breasts, how does this compare to men checking crotches? I think the results would find that straight and bi-males check women's breastsmore than women and gays, which should be no surprise.