pregnant?

So my bf was pleasuring himself (with right hand) and came so he got a rag and wiped it off with his right hand then wiped his penis with the rag with his left hand so some sperm may be on his left hand, but it was dry. About 10 minutes later he rubbed my clitors with his left hand (which he didn't jack off with, but wiped his penis off with after he used his right hand to wipe it off with) he didn't stick anything in but could have there been sperm on his left hand? And after ten minutes would it have lived? And even though he didn't put his fingers in me could I get pregnant?