Ineffable Ontological Detanglement .: Introspective Assistance & Mental Analysis Manual
The anger centres hit the sex centres, at the highest limits of anger you may get a little horny. I guess this was an aspect of the brain designed to solve relationship troubles. No, it's just, passion, moments you lose yourself in passion you start to feel your sex drive come into play. You're probably better off not pulling the soap opera move of establishing a relationship with this person thinking you've tuned into each other's passion, no, you've tuned into the fact that you both have anger centres that hit your sex centres.
In a relationship, engaging in the angry sex... Depends. Are you both fucked up crazy people and you know neither of you will be able to resolve this argument because you're far too fucked up? Then I guess engage in the angry sex. Otherwise, you're probably better off waiting until the argument is resolved, have S&M make up sex, not angry moment of passion sex.