My boyfriend wants to hear me pee

I know the title probably sounds strange😭, but I have a bf and anytime we’re on FaceTime and I need to use the bathroom he doesn’t want me to go on mute.

He literally asks me to let him hear me pee. I’ve asked him why and he never gives an answer.

My friends boyfriend actually does the same thing to her and he won’t give an answer as to why either.

I’ve asked my guy friends and they’re acting like it’s some sort of secret they can’t spill.

So, does anyone know or have an idea of why my boyfriend wants to hear me pee😭?

I’m genuinely curious because I just don’t get it