There is a warning on the registration page that says "Many men expect that they can show their pics on this site to women. In fact, most of the comments will be from other men, mostly gay." It's been there for decade. Almost no one reads it.
Though I must say a proportion of gay men on this site dropped down since then. Initially it was like 70% gay. Now it's something about 30% gay and may be another 30% bi guys.
Also, some gays get offended when female profiles comment on their pics. People are, indeed, strange creatures.