I had this experience of a public suppository insertion let's say.
We, our family and my uncle's family, came back from a trip to a lake nearby in the summer. I was 6 or 5 years old and we drove through this very curvy road back to my uncle's house.
I got very sick, I vomited the van, my uncle got very mad at me because of that.
When we got back to their house I felt better, once I got off the van my sickness was all but gone. So me and my cousins were playing over the living room carpet.
Then my aunt, a very big and fat woman, asked me from her bedroom door: Do you want me to give you a suppository?
I got paralyzed and said nothing. One of my older cousins said "in your butt!"
My aunt came back, sat on the couch, and called me with her hand. I was a very obedient boy so I went there.
My aunt made me lay over her lap. I was only wearing shorts so she just lowered them a little and had access to my butt. She peeled the suppository. I remember my cheeks being spread wide apart and feeling the air around my butt, she inserted the suppo and hold my cheeks together for a while. All this happened while my cousins and sister were playing on the floor. Then she let me go back with them.
This situation is stuck in my mind forever and I often fantasize with this aunt giving me suppositories in front of others. I didn't felt embarrassed, but humiliated which is worse.