When I was a teenager I would use the faucet from my bathtub to get myself off. I used to aim my pussy under the flow of the water (making sure it wasn't too hot or too cold) hold my lips open and let the water pressure work my clit. If the tub is empty and the water is just falling on your clit, I swear it feels just like cunnilingus.
When I was older I got a whirlpool bathtub and I would just aim my pussy at one of the jets… holy cow, it was like a vibrator and a faucet combined.
The only disadvantage to use a faucet/showerhead/jet is that sometimes you get filled with water and leak a little out of your pussy for an hour or so afterwards, but I kind of liked how it felt… kind of like a cream pie.
so don't do it when you have to be somewhere right after.