Hi,
1. Regarding Normal physiology, a female can have multiple orgasms and recoil time is less. Male take time to recoil so they can have their erection back.
2. having sex till you become exhausted is good, you can burn a lot of calories too. but you can't be doing it all the way age factor, a place where you have sex, recent fight with your partner or in the workplace,
stress, recent entertainment you had.
All this play in the duration of sex. also the base things your stamina, exercise, food habits and
yoga if you are doing.
3. You cannot avoid sex with your partner, it will only worsen your relationship. As your partner is demanding, you should be provided if you can not make her understand, or take her for counseling.
4. Kindly share your pills name, so it will be easy to understand the side effects of the pills or talk to your doctor who prescribed the pills for you.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr S.R.Raveendran, Sexologist