Mistress Kylie, it was a hoot. It was my then Mistress' idea. She had her own private dungeon in a factory building. The playroom was large and the floor was half hardwood floor and half wall to wall rug.
With her I usually wore a homemade leopard thong. But this time she wanted me to make up my face, torso, legs as best I could, with leopard body paint. I looked half leopard and half human. She wanted me to growl and answer in few words: think "Me Tarzan, You Mistress," that kind of stuff. She stood a few feet in front of me, first ordering me to flex, then she had me roll around on the floor and grovel to her. That's when I thought I was in real trouble and the "fun" started. I groveled to the carpet and the body makeup got all over the rug. I noticed it mortified and she said, "Go into the closet and get the vacuum," with a bemused look on her face. I vacuumed the floor and she said, "Go in the bathroom and wash that stuff off of you." I did, dejectedly got dressed, and went into the playroom to say goodbye. She saw me fully dressed, laughed and said, "What are you doing? Get on the floor and start groveling at my feet again!" I didn't have to be told twice.
I drove her back to her apartment after the session. When we arrived she said goodbye with something like, "Next time, just wear your leopard thong, jungleboy, no makeup," and laughed. Hell of a good time!
P.S. - Love the leather slave collar you describe. My longtime Mistress puts a heavy dog collar on my neck, pulls my ear and slaps my face to start every session. It's a ritual.