Thank you for your insight dalubaba. I'll definitely look into the exercises you mentioned.
Normally you take half an hour to recover from the first ejaculation. This is a normal situation.Some time you may be able to recover faster, but that should be considered as an extra bonus. otherwise half on hour is the norrmal.. Many a time libido is surprizingly low. this can be also normal.
If this continues for a longer time, you may do some exercice like male deer exercise, kegel exercise or some exercise from taoist yoga. Google this words to get details and you may practice if you think it resonates with you, otherwise discard it.