I was playing with a puppy last night. By "puppy," I mean "grown ass man down on all fours going 'ruff' and begging for ear scritches", and by "playing" I quite literally mean playing. He was fetching balls (no, literally) and getting bellyrubs (still entirely literal dammit) from me and a couple other thoroughly amused humans. And he was having an awesome fucking time.
To be honest I can't really see that sort of thing as sexual. Not that he was sexualizing it, at least overtly; ironically, he was wearing a lot more clothing than most humans in the room. I don't know whether puppy-play frequently culminates with going off with someone and humping their leg (or whatever), but this wasn't "oh baby woof at me again OHHH," it was more like... playing with a dog. Fun, cute, not panty-dampening but definitely smile-making. Puppy dude was really kind of awesome.
I'm still not a furry.