I think Bro did sexually abuse Dave by showing him his smuppet sex sites as something ironic, put them all over the house to the point where Dave is often forced to wade through fluffy smuppet asses and dongs all over his body "ironically" and censoring Baby Gonzo's nose like a dick when all the smuppets have noses just like it, making a connection with them in young Dave's mind. All this while there are hidden webcams around the house recording Dave swarmed by smuppets for other people to get off to.

I can also admit it's really fucking funny how Dave only sees something wrong with this once John hears about it and says that it's actually not very cool and just sounds weird. It's funny to me when you can see Dave getting super frustrated now that he knows it's not normal at all.