Can someone help explain this new kink to me? Water & breath play!

Ok, so I(30F) learned today a new kink, not sure if it’s true or just a porn thing. But, apparently there’s a kink where a guy holds down a girl with her head underwater & fucks her while she’s like that, it’s supposed to invoke like a flight or fight response which makes all of her muscles clench up… and I am super super interested in this! Anyone else?! I just want to know safe ways people have tried this. I feel like it’s breath play but with a twist.