ELI5: Explain Like I'm 5

Snowballing (sexual practice)

Snowballing is a sexual practice where two people are doing naughty things and then one of them ejaculates (shoots out fluid from their penis). The other person then swoops in and catches the fluid in their mouth. Then, they hold the fluid in their mouth and share it with the first person by kissing or passing it back and forth like a snowball. It's kind of like playing catch, but with intimate fluids instead of a baseball. This practice is not recommended because it can spread sexually transmitted infections and is not very hygienic.