Courtesy Spit 

Before having intercourse, if your partner's vagina is a little to tight, you can take a light amount of saliva and lube the tip of your penis with it. This will allow easier and smoother insertion of the penis.

Your pussy is too tight, let me throw some courtesy spit on my dick.

Courtesy Spit by Shocker40 July 2, 2011

courtesy spit 

when you spit on your on the other persons genitals, mouth or anus to provide lubrication

i gave her a courtesy spit her pounine wouldn't burn up.

courtesy spit by akirafire June 27, 2008

Courtesy to Spit 

When a woman doesn’t have the audacity to spit and not give a dry hand job.

Gavin Dobson got a dry hand job and it sucked because she didn’t even have the courtesy to spit on it.

Courtesy to Spit by Penisstiffyuh February 11, 2019