Has anyone ever 😂

My SO and I BD the other night and I told him afterwards to be prepared as I was fixing to start my period for the first time in 7 years (because of iud which is now removed) he told me that I was only gonna bleed a little bit for a few days and that's it, I said how do you figure that? He said because he knows his body like I know mine and he got me pregnant be said 😂 I love his wishful thinking!!! Has anyone's SO done this?!?!