My boyfriend and I were making out 5 days ago and grinding against each other. He had on a pair of compression shorts and thick sweats, I had on spandex running pants. Afterward he noticed a tiny wet spot (from precm) under the waistband of his compression shorts, the sweats were not wet at all. I have done some research and some say that sperm cannot travel through that many layers of clothes, but then there are others that say differently. I wanted to get a personal opinion for my case. Thanks for the help.