Guys plain yogurt can be a substitute for lube, just like butter or olive oil. They are a pain in the ass (hehe) to clean out tho, because surprise surprise they aren't water based like most lubes. They aren't meant to see the places you're showing them either ¯_(ツ)_/¯
Side note: you can also use hand lotion, but always check it online if someone had a problem with the brand you're about to use. Always make sure to get oily, not scented ones that are for sensitive skin.
But at the end of the day it's safer and more convenient to stick with regular lube! (⌒▽⌒)
Dude...just stop