Starting To Get Into Pain

The other day, I had a hookup with the husband in a gay marriage. He calls himself a BSDM Master. He told me his husband was his submissive.
We were alone in their apartment, and I stripped naked except for my panties and chastity cage. We went to the bedroom and I sucked his cock, he fucked me very well. He cummed in my mouth twice. We kissed and I passed his cum from my mouth to his. (I think he was surprised by that, and I'm not sure he really liked it, but he was the one who started kissing me when I was holding his cum in my mouth!)
While we were laying there in the afterglow, he began playing with my nipples. He began pinching them quite hard. It hurt, and instead of complaining, I decided to see how much I could take, and I began to moan softly.
It never really felt good, pain in my nipples, but after a while, I reached between my legs and began to finger my very wet, loose, well fucked ass. He was focusing on my breasts, pinching and twisting my nipples, when he looked down and saw my hand between my lewdly spread legs. Almost immediately, be moved his body between my legs and began exploring my chastity cage and my ass. My balls are nice and tight when they're being held by the ring of the chastity cage, and he began to slap them lightly. At the first slap, I flinched, but after that, I tried to hold still. Instead of crying out in pain, I tried to moan with what I thought could be taken for sounds of pleasure.
He then began to finger my fuckhole, I kept begging for him to put more and more fingers in, and finally, for the first time, I had a whole fist in my sissy fuckhole!
The next few days, my balls hurt pretty bad, from having them slapped repeatedly. It was nice though, It reminded me of a very good make-out session where I was well fucked, swallowed two loads of cum, and got fisted.
Several days later, I was running around the house in my chastity cage and girl clothes. Years ago, I had purchased a pair of nipple clamps. They were like rubber covered alligator clips with an adjustable set screw so one could adjust the pressure. I tried them out when I bought them, I wasn't impressed, so I put them away, untouched for years. I decided to try them out again.
I set the set screw so they didn't close all the way, and clamped them on my nipples. It hurt, but I also felt a surge in my chastity caged cock. I was wearing a mesh thong bodysuit that I liked the way my nipples poked through, and I liked how the clamps looked on the outside of my bodysuit.
After a few minutes, the pain lessened, and I tightened the clamps. Before long, They were as tight as they could go. When I released them, the pain was quite intense, as the blood flow and feeling returned to my sensitized nipples.
I did this repeatedly for the next several hours, first I applied the clamps, and crushed my nipples flat horizontally, then vertically. In between, with the clamps clamped on, I smacked my thonged ass with a paddle. Usually I gave myself 20 swats a session, 20 on each butt cheek, and across both at once. Several hundred strokes. I loved the look of my ass all red. With every stroke of the paddle, I felt a surge in my chastity cage.
For about three days afterward, my nipples were sensitive and pleasureably painful to touch. My ass was one large bruise on each ass cheek, and so sore, I could barely sit down. Again, this gave me an arousal, reminding me of the pleasure I had.
During this time, the days after my self administered abuse, I was constantly aware of my ass and nipples, and look forward to the time I can do it again.
It would be quite different if someone else was doing the spanking and nipple clamping, But I found it exciting having my nipples squeezed and twisted by my hookup the other day.... 
I think I'm going to get a switch, and see how my ass looks with self-inflicted welts on it!
It has always been my motto: Pain is OK, injury is not. I fear that I may outgrow this, and permit ass lashings and broken skin. I liked the way my bruised ass looked, and think that it would look even better with welts on it. The skin breakage would be accidental, but would occur nevertheless. (I have a penis pump, and pump it so hard, the vacuum makes blood vessels burst, and I end up with a bruised cock, it isn't intentional, but the swelling of my cock feels so good, I don't stop, and notice the bruising afterwards.)
It's never intentional, I'm just an extremist I guess!