What is what does double fisting mean?

It is an explicit sexual practice in which a person inserts both of their fists into another person's anus or vagina simultaneously, or using both hands to stimulate the genitals in a vigorous manner. This practice is considered extreme and requires a high degree of skill and communication between both parties to ensure safety and pleasure. Double fisting is not recommended for beginners due to the risk of injury or tearing of the delicate tissues involved.