Place your nuts in a bowl of warm water. Then have a girl put a straw into the bowl and blow bubbles under your balls. Rubber ducky is optional of course.

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When a male or something with nuts submerges their testicles into a cup of warm water while their partner blows profusely through a straw that has been inserted into the cup creating a jacuzzi affect. For added pleasure the penis is usually wildly jerked with the blowers free hand until ejaculation.

It when a male puts his testicles into a warm bowl of water while his female partner takes a straw and begins to blow bubbles under is testicles while giving him a hand job.

When a man teabags a warm glass of milk while two women blow bubbles into the milk through straws.

When one takes a bowl (ceramic/glass/plastic) fills it with warm water, preferably around 95°. Lower your testicles into the bowl. Then use a straw (preferably a silly straw) and have someone blow at a steady pace forming small bubbles that massage your scrotum/testicles. Just like a jacuzzi, hence the BALLCUZI

When you dip your nuts in a cup of warm water, and somebody else sticks a straw underneath and blows.

(Courtesy of Bixi Zeng)