Sometimes people have very detailed figging-type fantasies. I saw this one in a comment on Spanking Blog (where I think it may have since been deleted, as it was completely unrelated to the post where it was put):
Ok melt four ounces of clear glycerin soap. Add 2 tablespoons hot chili powder 2 tablespoons hot curry powder mix well. Pour into zip lock bag. Twist until all solution is in one corner of bag. Allow to cool and harden remove bag from suppository. Cut the suppository flat at the largest point this will make it so it cannot be pushed back out until it has melted. Which is going to be the worst hour of her life.
Have her strip and bend over the bed and spread herself open. Lube her anus well with your finger. Take the suppository and work it in and out for a minute or two. When it is getting close tell her to push out. This is when you force it in hard and fast. At this point she will be screaming. Let her stop screaming then she will realize that there is a fire inside her like she has never felt. She will beg to use the restroom. For which you have locked and have the key in your pocket. Tell her she may use the restroom after she receives 100 with your belt. And give you head and swallows every last bit of cum you give her.
When she is done she will think that she has been through hell and back but the truth of the matter is most women cannot push the large suppository out for at least several hours and the burning just get stronger and stronger with no other stimulation she will beg for your mercy.
At this point tell her you are going out and will be back in approximately four hours. Tell her to be bent over and ready for anal sex when you get home.
When you get home without saying a word you take her ass as hard and as fast as you can…
I think this guy may have anger issues? But the make-your-own-suppository angle is creative.