It sounds like hypomania to me. It also sounds really hot! I love my hyper-sex drive, but it can get annoying, since it's insatiable, and I have thoughts about cheating on my wife, just because I'm a sex maniac...

Anyway, enough about me, since you said you are being irresponsible and ACTING on your risky impulses... You are hypomanic, be careful! Risky behavior has consequences!
If it didn't I would be out having affairs right now just for fun!