DP asking some questions 😕

Mirelys • 1 MC on Feb'14 and 1 Rainbow baby born on Feb'15❤️ TTC#2 and 🐶🐶

why is it that you must not have sex every day while on your fertile days? I saw it on a post once but i took a break from ttc and totally forgot about the answer to my question, can someone please tell me? thanks in advance😊