Sex and discharge!!!?

I had sex for the first time in a while 2 days ago. It was just a hook up. I know I am 100% clean. Anyways, when we were done I noticed a good amount of thick white discharge at the base of his penis. I was so embarrassed, I tried to pretend I didn't see anything and he acted like nothing was wrong.. but isn't that gross!!?!?! UGH what is it!?! and how do I get rid of it so it doesn't happen next time!😫