that when a couple has sex a lot , like everyday , all month... That the horniess goes away???

So me and my partner have had sex a lot, But sometimes he can’t get hard .. Or i can’t get wet or it hurts me .. AND i get a lot of uti’s and yeast infections ... BUT THIS YEAr we only have sex like 5 times a month and it works better for us cuz he gets hard every single time we have. sex.. So it’s true???