Kinda reminds me of the first time I watched my wife fuck another man. He began by performing oral on her pussy and made her cum multiple times which was not uncommon for her. But then he began rimming her bung hole with his tongue which is something I had never done to my wife in all the years we had been married. She let out guttural moans I had never heard from her before as he rimmed her asshole with his tongue. She really enjoyed the rimming. I have since rimmed her bung hole and discovered she enjoys it. So the moral of the story is I learned something from watching another man have sex with my wife. Oh by the way, he also had the biggest cock she has ever had.