Traditional Japanese sex lubricants are made from Chinese yam. When Chinese yam is crushed, it becomes a sticky liquid.

In fact, 200 years ago in Japan, sex lubricants made from Chinese yam were used.

However, there is one problem. It is very itchy. When Chinese yam sex lubricant comes into contact with the skin, it causes a strong itch.

However, for masochistic men, this itch turns into pleasure.

In the end, they knead the Japanese spice wasabi into the yam sex lubricant and use it for handjobs.

Traditional Japanese sex lubricants are made from Chinese yam. When Chinese yam is crushed, it becomes a sticky liquid.

In fact, 200 years ago in Japan, sex lubricants made from Chinese yam were used.

However, there is one problem. It is very itchy. When Chinese yam sex lubricant comes into contact with the skin, it causes a strong itch.

However, for masochistic men, this itch turns into pleasure.

In the end, they knead the Japanese spice wasabi into the yam sex lubricant and use it for handjobs.