Muzan definitely turned Daki into a demon so he could have sex. When you're 3,000 years old, you definitely crave pussy. He would have turned Shinobu and Mitsuri into demons if he ever found out about them.
Heya babe I know we were supposed to be going out tonight and we're all dressed up, but look at spike! Hes so fucking needy, so I have to stay and make him feel better! You can go ahead though, it'd probably be better if we had some privacy anyway (mam