壺つぼ洗あらい

noun

sexual service of washing a partner's fingers or toes inside one's vagina

Slang term used in the context of soaplands; refers to a specific sexual service. Not used in everyday conversation.

See also: ソープランド

• ソープランドで壺つぼ洗あらいというサービスがあるらしい。

  Apparently there is a service called 'tsuboarai' at soaplands.