I know every sexual encounter involves primal urges and instinct but I mean what is the the MOST primally sexually charged instinctive perhaps unexpected sex you have ever had and why? was it perhaps for the first time with a boyfriend/girlfriend/. Details details. It happened probably not long after I turned 19 for myself. It was my first experience sexually with a girl and felt incredible! I can give details if anyone's curious but I'd like to hear other peoples stories and accounts. So what happened? be as detailed/non-detailed as you like. Why was it primal and instinctive? how did you feel? was there lots of eye contact?