Have had MFM, FMF, MFMFM and I actually prefer MFM. Love to tag team a responsive woman.
I have for my wives/gfs
stranger? no
another man? If you count a man on the bed beside his wife masturbating while I was on the other side of her doing the same so we could give her a cum bath, occasionally feeding her our cum, then yes...a number of times. But just sitting in a room with another man masturbating then no and I have no desire to do so.
1. Cum in a women's pussy....Thousands of times
2. Cum in a women's ass...less than a dozen times...ex wife hated anal and while my current wife likes it at times it isn't high on my list
3. Cum in a women's mouth...yep
4. Cum in a man's mouth...no, but a man has eaten my cum from his wife's pussy after I fucked her
5. Cum in a man's ass...never
6. Have a man cum in your mouth...no, but I have eaten men's cum from a pussy
There are quite a few on my list but the main one that comes to mind now was with a hotwife I was involved with for several years. She loved car sex so we engaged in it a lot and in quite a few locations both day and night. But my favorite memories was in their car and van while her husband drove. Several times on trips we would switch off. On one long trip back from another city, over a four hour drive, we each took 3 turns.
As a father I would rather not know.
Have I found something similar? Yep, more than once and one was my niece. It was about a 5 minute video of her giving her husband (never saw his face but it sounds like him) a BJ including him cumming on her face. Per her request btw. No way would I tell my sibling I saw their daughter in such an act. Nothing to be gained.