Trick treasure 

trik ˈtreZHər
noun
When a sexual partner used simply for sex (a trick) inadvertently leaves personal property at the scene of the encounter.

Friend: Gurl where did you get that jock-strap?
You: I know! Can you believe it was Trick treasure? He also left a bottle of lube!

Trick treasure by IndyJeff November 10, 2022

Treasure Track 

Also known as Treasure Trail

A soft line of hair running from below the navel to the top of the pubic area, and sometimes right into the pubes. This can be found on women, usually ones of darker skin tone. Sometimes it isn't hair, but simply a darker line of skin.

Wow, that brown girl has a cute little treasure track running down her gut.

Treasure Track by Time4SumAksion November 23, 2004