Okay, what's the better personal lubricant... Silicone based or water based and why??

i have no personal fav... but water base is healtier since it cn be washed and dissolve in washing, until oil based that takes some time b4 it can be really washed out, which can be a source of an infection and also could damage the l wall, friction plus pressure could make it sore and damage tissue that could lead to erruption and perfect breeding ground for bacterial growth.