Passion.

What is there to talk about? Everyone, or almost everyone, has experienced this state. When reason, logic, and rationality turn off. When there's nothing human left in you. Only animal passion, lust for the human body.
And it's not always about love. Passion is often mistakenly referred to as love. In my opinion that's not true.
Love is still the basis for sex, not the other way around.
Although many would not agree with me. And that's okay.
I'm not lecturing you on love and passion. 
I'm just trying to describe my own picture.
And your agreement or disagreement with my opinion is fine. 
Allow yourself to be yourself and others to be different.