Hey look, I’m good at something.

Yes, but that’s why x86 assembly programmers do it…

Yes, but it’s not universal that xoring a register with itself is more performant than simply loading it with 0.

an x86 assembly programmer

Ftfy. not all CPUs have an xor register with itself instruction.

It makes sense in porn, when the point is to show every detail up close, hair obscures the details. It’s just that so many people then decide porn is what they want to model themselves after, or what they expect of partners…