A sexual act in which the anus and vagina are penetrated simultaneously.

While “double penetration” is commonly used to describe group sex, the term can also refer to the use of toys or fingers during solo play or sex with a single partner. As is the case with all types of anal play, it is important to choose safe toys with flared bases when enjoying double penetration and to use appropriate lubrication. Anal toys should not be used vaginally, as this can cause infections.