Honestly, I don't think either of them are all that great. They just have that same hardcore mess of a look to pass as coming from the same gene pool.
Being a straight woman, the having sex with them thing, in my mind, is purely out of assuming what someone else who would tend to go for women might be attracted to. Mostly, for both, I'd think it was based on having a wild night of sex with some rock star kind of desire. Then again, there are all sorts out there and, thankfully, not everyone is turned on or off by the same types.
With that said, I also don't think that either are hideous either. Both are just very average Punk Rock girls doing what they love best. Can't knock them for that, especially since there are those who get a kick out of that.