As opposed to grown men playing with trains and trains sets?
That's a good example of something that is accepted vs. something that is not (playing "guns" with GI Joe dolls).
Men paint themselves and go games, rabid over their footballs teams. They can quote you stats and players and game highlights from the beginning of time. That's socially acceptible, no matter who you are.
Other men wear Starfleet uniforms and go to conventions, rabid over their favorite TV show. They can quote you lines and actors and episodes from the beginning of time. That's not socially acceptible outside of the niche group interested in these things.
In my eyes, it's the same thing. Society just looks at 'em differently.