Equinophile
Tourist
As in, Does your mare (or stallion) bob their head and/or rock back and forth/side-to-side when you're pounding away back there? Sometimes my partners are still as statues, or will just sniff around, but I love it when they do some kind of rhythmic movement in tune with my thrusting. It just really makes me think they like what's going on and are in tune with me.