>>112190363She's not exclusively into chicks, she's bi. Or maybe more, depending on how you view literal plants that don't really have a male or female sex/gender because they're plants instead of people.
And to be fair, he is Batman. Who HASN'T had an attraction to him at some point?
>>112191506Because she has the whole poisonous kiss gimmick, and poison is in her name. Yes, the plant poison ivy is't actually toxic, and she probably knows that, but it gets the point across that she's dangerous and plant-y.
Venus Mantrap isn't particularly indicative, since she generally doesn't eat people herself, and especially not with her vagina.