There is no maximum limit for frequency of sexual intercourse. It depends on one's libido, stamina/endurance and overall physical health. Sexual intercourse has no negative effect on health rather it is beneficial for overall well being provided you take precautions to prevent STIs. There is no right or wrong way to do it (everybody has their own ways). There is no association between frequency of sexual intercourse and fertility.
Next Steps
Keep on cherishing the physical and mental health benefits of sexual intercourse