No, no sneezing. It just happened pretty suddenly. I am not having the urge so much now. I do masturbate three or four times a night. Yes, i was enjoying it until it got so often.
Ah, it was when they yawn, not sneeze. I looked it up. It is an antidepressant called Clomipramine, and is a side effect experienced by something like five percent of people who take it. (The article I found commented that people taking it would likely seek out the most boring possible person at parties.)
Does it happen when you sneeze? There was something in the medical literature about ten years ago about a medication that caused (as an unexpected side effect) that whomever took it would orgasm when they sneezed -- I am pretty sure the trigger was sneezing. There was a lot of genteel joking in the article about people sheepishly asking if they can have more of the medication, etc. Have you changed some meds recently?
If not, possibly you're just having a change in the pituitary, hypothalmus or even thyroid? And maybe it gave you an unexpected hormone flow?
You're sure it's a hormone reaction, not a muscular reaction like a tic or spasm, right? In other words, you are having other hormonal symptoms, like bloating or mood changes or something else that would make you recognize it as hormones?
It sure is interesting. Are you enjoying the ride or is it a nuisance?