Claudio, like most things to do with sex, every time is different. Every erection is different, every time you have sex should be a different experience, every orgasm is different. For a start, if you maintain that every single time you have sex it lasts 15 minutes, then I would say that it was a little abnormal and that maybe you and your partner should be experimenting some more. Soemtimes you'll want a quickie, sometimes you'll want long, slow, gentle lovemaking. With my partner, it depends entirely on what we're doing to eachother and ourselves. We sometimes cum after 15 minutes, sometimes after 2 hours or more! And whether or not we go again straight away or not depends entirely on the above as well. Sometimes I'll go for 15 minutes, cum, and just want to sleep. Sometimes I'll go for an hour, cum, stay hard, and stick it back in my partner for a re-match. Simetimes I'll go for a while, cum, my cock will go soft for a short while, then get hard again. Every time should be different, imho. Try experimenting, and most importantly, HAVE FUN!
