Sex question??????

Me and my guy friend have sex a lot lol and I’ve noticed that whenever we’re in the position where we’re standing and he’s lets say “hitting it from the back”I stand on my tippy toes. I didn’t think anything of it, but he just recently brought it up because he doesn’t understand why I do it. I basically told him

it’s because you’re kinda a bit taller so yea I have too. Ladies I know I’m not the only female who does this..?