Mine are .
Full fat whole strawberry milk .
Breast milk .
Rose and glycerine water .
Isotonic saline with a hint of ginger juice .
Urine . Fresh and still warm .
Coffee .
Low alcohol ginger wine or beer .
Soap solutions with water .
Suppositories made with mixing sperm with plain jelly and leaving to set using the pinky fingers of small rubber gloves as a mold .
These are some of the kinkier things i have used or have had used in me over the last 40 years or so . Never had any side effects apart from the coffee made me hyper for a few hours after and went on a cleaning shopping spree ending up with half papering the living room before i settled down knackered .
I hope some of the things are new to you and that you have fun using them . If new test for allergic reactions first before putting up your bum . Safety first .