Fem guys

I am not saying this to shame anybody for their preferences, however i am genuinely just curious… if you are into fem guys whats the appeal to them as opposed to doing stuff with a woman? I guess if you are a gay man you wont be attracted to a woman, but then by that logic wouldnt you be more attracted to a masculine man? For the bi men, do fem men do things better than a woman or is it just a difference of what the feeling is? Again, hopefully this isnt sensitive just genuinely curious.