Walker is a 4 month old humper too. He hasn't witnessed any x-rated scenes that i know of

He doesn't go for my or dh but some of our friends are like magic. We tell him no, detach him from his victim and have them put there legs up in the chair/on the couch with them so that he can't get to them and he forgets and runs off. Its sort of a temporary solution but its the only thing we've found that works so far. Good luck
P.S. I'm giggling uncontrolably. real mature I know