I've never understood this logic at all. I'm sure lesbians like vibrators and such because they feel good. End of story. A woman isn't straight just because she loves dick. If that were true then women would love transsexuals, also.
If a man prefer intercourse in a woman's booty then is it simple to say "Oh, why be straight then? He might as well fuck men if he loves ass"?
Attraction isn't exclusive to genitalia. A woman loves a woman because she's attracted to that woman. I'm sure a sweet vagina is just a cherry on top of the cake, pardon the pun.
I don't love my wife because she has a vagina. I love her for who she is.
Sex toys are not necessarily imitation penises. My dick doesn't swivel and have beads embedded in it. It sure as hell doesn't have a smaller appendage to stimulate the clitoris either.
What gives pleasure gives pleasure. Inanimate objects don't have gender labels. They're just there to be used by whoever wants to use them.