Action;
So, when he heard about 'plush rump' he didn't really put the sentence together properly. He heard 'Plush', thinking they were referring to plush animals.
He walks in the door, expecting a specialty toy store, so when he sees what the place has to offer, he is nothing but confused. Completely unsure of what half of these things where as he pads around in the store scenting at certain things, wondering why everything had a distinct rubbery scent to them. It caused quite an interesting expression, his lips peeled back and his mouth open wide while he tries to figure out just exactly kind of store he was in through scent alone.
But then he's never been in a store like this.
And then he sees a cover for a pornography magazine. "Eeh?"