The mania also helps. Bipolar isn’t just a happy-sad thing. The manic phase is categorized in the same group as schizoaffective disorders. Some of the most common symptoms of mania are hyper sexuality and feeling invincible. Imagine being absolutely insatiable even while doing it. So you keep going harder and harder, trying to find something to sate the urge. And the entire time, you’re delusional to the point of thinking nothing will hurt you. If you’re a manic girl who just brought home a random hookup, he’s about to get sex so hard his entire genetic line will be impressed.