I have OCD and one I'm afraid my girlfriend getting pregnant from leftover semen on her hand after she masturbates me. I know it sounds odd but I can't seem to stop obsessing about it. Ill even clean the toilet seat if I know she's is coming over just to be safe. I know semen dies when dry but how fast does it dry on skin. Can leftover semen in the urethra when urinating get on the toilet seat? Can you please help me ease my mind? Thank you.