Conversation

Funny kanji time.
金 = "kin", and means gold
玉 = "tama", and means ball(s). Japanese has no difference between singular and plural.

Combine them:
金玉 = "gold balls", right?
It actually means "testicles." 😄

This word came about because tanuki scrotum skin would be used to pound down gold into sheets. Tanuki scrotums are apparently very good at this because they are very strong and very flexible. Strange, yeah? That's why Gold balls = testicles.