Trying to sleep (have to laugh at myself)

So it's time for bed and I can't sleep so I start watching an episode of a show that was recorded. After a bit I feel tired enough to attempt to sleep. After laying in bed for about 30 minutes I realize this is not happening. Back to watching television. About another 30 minutes later I feel it's time to sleep and try again. Guessing 15 or so minutes later I am still having difficulties.

I then remember that sleeping on my stomach use to work and matter of fact slept on my stomach all my life until five years ago because of a surgery prevented it and became a side sleeper. Why not give it a try I thought. First problem, my breast get in the way and it's not helping me to sleep so I figure out how to position myself via how my arms are positioned and I think it's working. Then out of nowhere my vagina gets excited I think "not now" so I re-position myself on my side, dang feelings persist. If there is one thing I have learned about down there is once the feeling starts it's not going away anytime in the near future. About the only thing I can do is work it out and think well when still male after orgasm I could sleep. It was a risk and mind you I like orgasm but really, right now, no no no. Well it seems that I did what was needed and did finally fall asleep. I have to laugh because I like those feelings but not that intense, and they were intense unlike before when going to sleep they are barely there and when really tired non-existing.

For the life of me can't figure why they started as there was nothing in my head that would arouse me and laying on my stomach should not have started them. Would welcome any thoughts on this.