Boyfriend and Period

So this may seem a bit weird... I don't know about you guys, but whenever I know I'm gonna start my period, I never start. Like one day I will be like "Ok I know for sure that I'm starting tomorrow, I can feel it!" But I never end up starting 🤷🏻‍♀️ But alas everything will be ok! All I do is tell my boyfriend "Hey. I need you to trigger my period." He knows exactly what I'm talking about. We have sex! Literally the very next day I always start my period! Idk if I'm the only one that does this with their boyfriend, but it definitely works! Obviously that's not the only time we have sex lol but I thought I would share this weird thing with you guys! 😅