You can not get pregnant if a guy goes to the bathroom, comes back, and touches you.
Even if that guy peed on his own hands and then he returned to rub his urine covered hands all over your hot naked body.
Even if he clasped your hands in his cold clammy fingers, pleaded his undying love for you, and then you went to masturbate furiously without washing your urine-covered hands first.
On a side note… WASH YOUR HANDS, PEOPLE!!!! Hygiene. Basic hygiene. It is your friend.
Explanation for why you can not get pregnant by hanging out with guys who need to empty their bladders on a regular basis:
Any sperm that were still in the urethra when he was peeing would be killed by the pee. (Note: This is not true if you’re fooling around, but is true for actual urination. In other words, a man can not go pee to kill the sperm and then come have sex with you and assume you will not get pregnant. Peeing before sex does not make it safe.)
Furthermore, even if they weren’t killed by the pee the sperm has to get inside your vagina. It can not crawl through your skin.
Sperm is, fortunately, not the creature from Alien.