when a girl puts your testicles in a bowl of warm water and then gets a straw and blows bubbles in the bowl, making your balls feel like they are in a hot tub. A hand job along with this is ideal.
The art of inserting one's testicles deftly into a slut's vagina. Then anal penetration via phallus follows.
This is said to be as difficult as giving to cats a bath.
After fucking your partner in the ass and filing them with your load, you try to stuff your balls in their pucker hole. It will be so slippery and tight it will be like trying to keep "two puppies in a tub".
With my goo seeping out of Rhonda's star fish, I tried to cram my balls inside of her. It was like trying to keep two puppies in a tub.