Have You Experienced Erotic Anal Spasms When Receiving A Spanking?

There were times when a dominant female or dominant male would strip off my clothes, have me get on a bed on my hands and knees with my plump bottom up in the air, and would spank my bare bottom using a slipper or riding crop. The stinging slaps would slowly increase in intensity and make me feel vulnerable and submissive. The stinging slaps would trigger anal spasms and intense erotic feelings of pleasure. I began to crave the pleasure and pain that I was experiencing. I now use a slipper and riding crop when I give and receive a bare bottom spanking. I am curious as to whether others have experienced erotic anal spasms when receiving a spanking.