When I was 20 and my Sister was almost 19, we were at my condo. We did some coke, drank Vodka and juice, then started getting touchy feely. I ended up sticking it in her and we fucked like minks for a couple hours on and off. My biggest regret is I came in her two times, and was on pins and needles for a few weeks. Sex was great. Much more but that will have to wait