After about 7 ejaculations it is hard for me to get another erection how can this be improved?

You're obviously wasting every ones time with your ridiculous and outlandish question. If you could maintain an erection after one ejaculation. You wouldn't have time to be asking idiotic questions. In all seriousness though, in order to achieve an erection after seven ejaculations, you must place a gigantic cucumber in your anus, do 35 jumping jacks and then defecate on your mother for giving you life. Please post your results.