Me and my boyfriend were in the shower, and I was rubbing on his shaft the penis was facing upwards. He ejaculated and I wasn't aware, he claims he washed it off and wiped with a dry towe, and we did it again (I was not aware he had ejaculated). Is it possible to become pregnant? There was no penetration just rubbing. Even if there was somehow sperm on his stomach while we were? Is that a possiblitity. Also, it was the last day of my period and again no penetration just me rubbing my butt on his shaft in the shower.