One of the symptoms of mania in bipolar I disorder (mania, not hypomania) is hypersexuality. I've had that problem since I was 5 years old. I'm not exaggerating. I put my crayola markers through hell. You can google it and see if this is what you are experiencing. A lot of people with bipolar I mania with hypersexuality have trouble controlling it and it ends up ruining their lives. Thankfully, I've been able to control mine to a point. I've been married 23 years and have not been unfaithful to my husband physically but I have had one emotional/online affair. It only lasted about a month, but we're still working through it. It devastated both of us because there was absolutely no reason for it on my part, aside from the excitement of having some stranger to talk dirty to. At the moment, I feel like garbage, and am speaking to a therapist weekly about how to control that impulse. But, other than that, in 23 years, I have not been unfaithful to my husband. We do, however, have sex way more often than most couples, sometimes multiple times a day. I lost my virginity at 15, but had been masturbating since I was 5. I figured it out just my playing with myself. I was fascinated with my girly parts at that age and couldn't keep my hands out of my britches. I had no idea what I was doing and what that feeling was until I was about 9 or 10. I would do it multiple times a day. By the time I was in high school, I learned how to use the seam in my blue jeans to masturbate while sitting in class with no hands. So, yeah, hypersexuality is very real thing.