My grandfather was staying at my house when I was about 5 years old and me and my 6 year old sister snuck into his room and saw his ass sticking out of the sheets.
didn't really sneak in because we had to walk through it to get to the rest of the house, but when we saw his ass, we carefully lifed the sheet off him and saw his ass and hole and there were some like huge mole/wart things like on a witches face.

We were pretty grossed out and my grandfather woke up, grunted at us and pulled the sheet over his ass.