calling my partner daddy

So I never did it before until I saw all the talk about it in this group. I did it and lord our sex life just got better thanks to just one word lmao. Everyone got their opinions about it, but thank you ladies. You can learn all kinds of different things from fellow ladies. 
So here's a question for y'all when did you first start saying daddy and why? Where did you learn it from? 
And for the love of god please don't comment going oh that must mean you want to fuck your dad. Like no stop it. What goes on in the bedroom is exclusive from my every day life thank you 😊