Beastiality isn't exactly my thing, but I'll go for it.
And beastiality is onlywrong here because they can't really say no, they mostly act on instinct. However, like another person said, Pokemon are a lot more intelligent and if they are interested in you, you'll know, and if not, well, you won't be around much longer most likely. Anyway, it's an intelligence thing and Pokemon are a lot smarter than animals.
Think Aliens with no common language to share besides the telepathic ones.
"Why do I check for updates when I know there's nothing there?"