I'm just going to dive right into it. Not everyone has good sex. Not saying that they suck (no pun intended) overall, they just have bad chemistry with certain people. The crazy thing is that while you might have spectacular, sweat it out, orgasm-inducing sessions with one person the experience might differ when you're with the next person. Watching paint dry could be more exciting.
Sexual chemistry is a complex dynamic. What looks good on paper may not always translate into the bedroom. The physical aspects of sexual compatibility are the easiest to define. It encompasses such things as a couple's mutual like or dislike of various positions, sexual variety (oral, vaginal, anal, etc.), timing and sexual longevity. Other physical aspects involve the various tangibleness of our bodies, such as penis size, vaginal tightness, overall height, weight, breast size, butt size, quality of personal hygiene, etc.
I'm going to give you some insight into how my mind works. When I first become interested in a woman I usually try to gauge how well she is in bed. This gauge has nothing to do with her body type, how full her lips are or whatever freaky shit I can imagine her doing. Some women I just imagine or fantasize as being thrilling in bed and it has no rhyme or reason behind it. My 6th sense isn't always on point because I've been wrong on many occasions. On the flip side I've imagined that a woman might be a lazy or boring lay and was pleasantly surprised when I was left breathless.
Have you ever experienced a sexual encounter where the sexual chemistry was so good that you had to wonder if they could read your mind? What about sex so bad that you actually felt sorry for the other person involved? What physical aspect do you use to determine if someone might be good in bed? And what's up with me writing/tweeting about sex so much lately? lol