About a half a year ago I was getting really bored with jerking

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About a half a year ago I was getting really bored with jerking off, and had been doing CBT instruction videos (slap your cock, slap your balls, etc).

Along the way I realized I could use my lack of enthusiasm for fun. I got a toilet paper tube and put thumbtacks into the inside end, and pulled my penis through, flaccid. As the predicament of an erection become arousing, I got hard and the thumbtacks were very painful. They are too dull to pierce the skin.

A day or two later I woke up horny for more, and that was the night I sanitized a new sewing machine needle and slowly pushed it through my scrotum. At the bottom. It hurts a lot, but it was psychologically rewarding to see the needle go through the front side, and then feel it inside, and then to finally see the tip pushing out the opposite side, very slowly. The largest pain was when the tip came out the back side. It was extremely arousing and I had a very powerful orgasm almost instantly.

I know that's pretty crazy, but there might be other things in this caliber of sane-insane that might interest me. Does anyone else have anything they can share? For reference I am 37 and am finding the novelty of vanilla masturbation is about used up at this phase of my life.