Precum

A slightly viscous liquid ejected from the tip of the penis that acts as a lube for a hole. Does not contain sperm.

“Honey, all you need to do to get mommy moistened up is shove your dick inside of me and swirl those precummies around.”
“But mom, can’t that get you pregnant?”
“No sweetie, precum is just lube for my pussy. It does not contain sperm”