ok, so my boy friend and i were fooling around in his basement, when i jerked him off. I cleaned him up and washed my hands. He touched a small amount of sperm, and just wiped it off on a towel. We fell asleep for about 30 minutes in his basement, and when he woke up, he started fingering me. I was so worried about me being pregnant, that we looked online about how long sperm can live. We know that when sperm touches air most of it dies quickly, and we also found out that sperm can only survive around 15 minutes if the temp is less that 70 degrees. The temp. was around 63 in his basement. Can i be pregnant from the left over sperm on his finger after he fingered me?