Strawberry bagel
When a woman who is currently menstruating pees in a cup and let's it congeal into a fine jelly like substance. She then proceeds to spread it on a bagel and serves it to her sexual partner telling him/her that it it a bagel with strawberry jam on it.
Carol: Did you hear about Lizzy? Susan: No, what happened? Carol: Her girlfriend gave her a Strawberry bagel!! Susan: That's super hot!