Vocab.

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Felching is a sexual practice in which semen or other fluids are sucked out of the anus of a partner. The act of sucking the semen and then passing it, mouth to mouth or open mouth kissing, is referred to as "snowballing"; although the latter is typically associated with semen ejaculated into a mouth from fellatio.

Felching can also mean the licking or sucking of another person's anus, may involve the use of a plastic straw and is similar to the act of a rimjob (anilingus) [1]