The Japanese term gokkun is used to describe the sexual act of consuming a large amount of semen, usually from a glass. While there are a few different forms of the activity enjoyed by people, most involve several men masturbating into a glass before a woman drinks it.
The most common drinking vessel used is a glass, as it means the semen is visible to spectators — which heightens arousal. Other containers used include baking pans, beakers, bowls and cocktail classes. Some of the most extreme pornographic videos feature more women drinking the semen of more than 100 men.
It is thought that the word used to describe this practice is onomatopoetic, as it is similar to the gulping sound made by the person drinking the semen.
Both men and women can be the one who swallows the semen. These sessions are often combined with bukkake sessions, which involve a group of men ejaculating over the face and body of someone. The first thing to arrange is therefore the person who will be ejaculated on.
This can be quite an intense experience, so it must be someone who is confident, experienced and takes sexual gratification from semen play. This is usually the hardest part of arranging a gokkun/bukkake session, as finding men willing to masturbate and ejaculate over someone is usually very easy.
The session must be arranged in a private location; however, outdoor sessions in secluded areas are quite common. Once everyone has been invited, a set of ground rules should be agreed and communicated. Like all sexual acts, consent is non-negotiable. The person at the centre of the experience should be able to change his or her mind at any point. To this end, there should be a safe word agreed.
Gokkun sessions can involve anything between one and several men. For some people, it is an activity enjoyed between two consensual partners in a loving relationship. For others, however, it is a group activity based on excitement and taboo.
The amount of semen consumed can differ greatly. Some sessions involve hundreds of men ejaculating into a large glass before watching someone drink it. However, several people can be involved in the drinking, depending on the set-up. The amount involved ranges from a little in a shot glass to a pint of semen in a tall glass.