Protective glasses to prevent semen from getting into your eyes .
My friend Shane always keeps his safety glazes on when I'm around.
when a guy busts nut inside a girl during sex but its safe to do so because she is on birth control
You: Did you bang your girlfriend yet?
Friend: Yea dog for sure... she on birth control too!
You: Awesome, so you safety busted in her right?
Friend: Hells yea i did!