Years ago, when I was in my early 20s, I had been dating a girl for awhile. It wasn't deeply serious but we were always together. She was about 5'4, Portuguese/ Brazilian with huge tits. I believe she was a 36DD or DDD. We were out with one of my good friends that night then later went to her house and drink. She was a very sexual person. At a point she grabbed my hand, said "I'm horny" then lead me to the bedroom. We had fun for about 20 minutes. The bathroom door was right next to the bedroom door which was kind of open. At one point my buddy went to the bathroom and said something about how loud she was. She replied with something like "wouldn't you like to make me scream". He had some comment about it being the best night of her life. We had just finished before this banter started. Her next comment of "well let's go" or something like that lead him to coming into the room. She was laying next to me in bed, tits out and my load dripping out of her (I hadn't gone for the towel yet). There was very little small talk before he started admiring her tits, pushing them together then sucking on them. That lead to them kissing. At that point, I never been part of something like this so I told them they could do their thing. I was going to clean up. They fucked for a short while. He didn't last long. She later told me it wasn't the best night of her life lol!
Fast forward to now, I have two close male friends. One is open to a lot of things. Him and his now ex-wife used to play with another couple. Him and I have always shared photos of the women we were dating. I can't see him and my wife together. Just one of those things. As for my other friend, he's very vanilla. He was very turned on by seeing one of her breasts starting to make an appearance while we were all sitting out by the fire a few months ago. He told me he kept thinking "I shouldn't look". He'd probably be done before he started