Butch lesbians?

So I have a question not meaning to be offensive...but I have a friend who is a lesbian...she "was" very girly girl long beautiful hair high heels the works..she dated other girls obviously..the other girls were "butch" for lack of better term ...(dress like men short hair etc) well after a month of them being together my friend has now shaved her head binds her breast so they look flat and dresses like a dude as well...if you are a lesbian then you are attracted to women right? So why date girls who looks like dudes ?? I'm so confused?? It's honestly not a mean question I'm very loving and accepting of all people I've just been dying to understand this