I think men are just wary of being seen as creeps. At a recent job search lecture at my uni we were told to never have a picture on your CV, with this as example of how it goes wrong: "Let's say you're a beautiful woman and you send a company your CV with pic on it. Now, the reviewer of your CV is male and if he asks you in for an interview the other employees at the company might suggest he did it because of the way you look. The reviewer will avoid this awkward situation by throwing your CV in the trash. Do not have a picture on your CV."

Basically, the expectations of a modern man's sexuality are pretty fucked up and contradictory and most prefer to avoid the entire thing in public.