There is zero risk of getting HIV from mutual masturbation, oral-anal sex (aka rimming, eating ass, etc), sharing a glass, sweat, or other types of casual contact. Likewise, there is zero risk of HIV from getting cum on a cut, unless it is a fresh, open cut where HIV could gain entry. Fingering also has no risk unless there is an open cut or wound on the skin, although fingernails could damage the rectum or vagina and make it more susceptible to infection through subsequent sexual activities like intercourse/fucking. You can talk to your provider or call the City Clinic PEP line if you have questions about whether you need PEP. Fisting (inserting part or all of the hand in the rectum or vagina) in and of itself is not considered high risk for transmission of HIV. However there is a much higher risk of damaging rectal or vaginal tissue, which would be much more vulnerable to infection through any intercourse/fucking that happens after fisting. Washing up before and after ass play like fisting, and using latex gloves, and/or making sure there are no open cuts or wounds is a good idea to prevent transmission of infections.