Example 1:
Jack and
Jake are in the tub. Jack cums in
JakeJack: "I'll be right back to blow you, don't finish without me."
3min later Jack returns only to find the tub water murky in cum....
Jack: I thought I told you to wait
Jake: I did, I just farted...
Example 2:
-You're a dickwipe
-Oh yeah? Well you're a Cumfarter! ...I win!