Experiencing Orgasm While Doing Lower Abdominal Exercises. Stopped Nocturnal Emissions. Suggest The Treatment?

Question: I am a 25 year old healthy, unmarried male. As far as I can remember, I've never intentionally masturbated in my life. However, a few years ago I began ejaculating/experiencing orgasm when I would excercize, more specifically with excersizes that stimulate the lower abdominals (pull ups, leg raises, occasionally push ups and sit ups). Over the past few years this has escalated to me experiencing orgasm and ejaculating almost every time I near exhaustion while excercizing the lower abdominals, which is sometimes several times per week. I guess my question is whether or not this is something I should be concerned about. I have never been sexually active. Also, since this has been happening more often within about the last year or so I have stopped having nocturnal emissions, when I used to get them about once per month (which makes sense to me, since I'm having sometimes several ejaculations per week already, but I just thought I'd throw that out there as well).