I never preejaculate... the problem is I don't cum rly easily in the first place because I get out of shape. That's the only problem, and changing positions usually is annoying for me.
And cardio = muscle killer, and I don't whanan lose the little gains I've got in the past 6-8 months or whatever... that is the only reason.
It's also weird that I get rly uncomfortable on my back... usually my dick will just... plain... die.... I have no idea why... dogy style and missionary are the onyl positions I can do properly. Missionary still being the only position where I can maintain my rock hard er. it's not right.
Ok. You're not supposed to jump on her and just go like a jackrabbit until you run out of breath. Slow down and let her feel you moving, stud. She'll get to move with you that way, rub her clit against you in missionary, you can try out entering her at different angles, etc. Most important, you can pay attention to what she's enjoying and give her more of it. Don't get yourself breathing so hard you can't kiss her. She doesn't want to be huffed and puffed all over... unless she's crying out for a good pounding, in which case....
If you want to change it up without pulling out, you can scoot from missionary to a kneeling position (with her knees up). It's a handy position because everything's accessible (clitoris with hands or dick, tits with hands or mouth), it's visually stimulating, you can push her legs toward her head and do some heavy pounding (don't push her legs too far back or you'll go too deep and possibly hurt her if you've got a decent sized pecker), going fast is easy because of the position of your hips, going slow and teasing is easy because you're in the driver's seat. Great position.
Your loss of erection sounds psychological but it's probably a good idea to get checked out by a doc and make sure it doesn't indicate any cardiovascular problems. Taking drugs sounds like a goofy and unnecessary thing to do unless you have a physical problem to overcome. Ffs I'm 37 and never taken any dick drugs. You'll do fine without. Don't jerk off too frequently, obviously, and consider if you're overtraining. I have a hard time reaching orgasm if I'm overtrained.
Don't bed a woman who doesn't turn your crank just because she's at hand. Examine your fantasy life and find out what turns you on. Maybe you're a kinkster or a fetishist and can't enjoy sex without candlewax on the nipples or spanking her with a raw steak or something. Maybe you're a relationship kinda guy. Historically, I've enjoyed relationship/familiar sex more than one night stands when both of us aren't quite relaxed and comfortable with the other one. Reevaluate how you fuck and use your dick in a way that you both enjoy instead of treating sex like an extended sprint.
Jeez I'm like Dr Ruth over here.