Men who are attracted to women might be afraid of supposedly “acting like gay men,” as we understand that today, just like they’re afraid to supposedly “act like women.” That men can be socialized out of displaying what might be considered feminine aspects of a normal human personality doesn’t mean anything besides that human beings like to fit in with their neighbours and not stand out too much.
As long as any kind of social record of same-sex attracted men could have existed, we have found evidence that they were there with everyone else. They just happen to be attracted to other men. But gay men are just regular men, like all the rest. Not “real” men maybe even (horrors) like women. Gay men have long been slandered as being defective.