Why do guys bother lesbians?

So many guys make comments & try to push up on lesbians as if they want to have a 3 some of something. The definition of a lesbian is someone who doesn't like men at all. Why do males also think that with sex they are able to turn girls. Trying to push up on a lesbian is the same as a gay guy pushing up on a straight guy. True lesbians find men disgusting sex wise.