I like the idea, I'm also a fan of WQ(single player anyways) and the sims. But I think its a really good idea tbh, and yeah it could be accomplished via roleplay but for those of us who like the realistic aspect i think it'd be good. It'd also be cool to throw in actions between animals, like nuzzle, growl, ect. but for affection type actions you'd have to approve it before hand. that way people aren't annoying you by licking you or something.