A man just dripped cum on my buttcrack, he claims it was one small drop. All I know is it felt wet. I was standing. And there was no penetration. But I am afraid some sperm ran down my buttcrack. I immediately took a sheet and wiped up. I didn't feel any hit my vagina. But am afraid about what if it did and I didn't notice. Since I immediately wiped the sperm is the sperm dead and unable to travel anywhere?