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When used properly, the internal (female) condom protects against unplanned pregnancy and STIs, including HIV.
Fisting (fist-fucking, handballing) involves penetrating a vagina or anus with the entire hand.
In some monogamous and non-monogamous relationships, partners may feel comfortable and safe enough with each other that they decide to have unprotected sex. This agreement can be called a fluid bond because these partners now exchange body fluids.