Like Rosie H said, the ones with the detachable heads are good, especially if you can get one with a pulsating shower head. (Like Peggy Bundy, I named mine Geoffrey. lol) But keep in mind that you want to use this on the outside of the body only. Just like douching, if you introduce too much water and wash away all the good bacteria you could wind up with a yeast infection.
Have fun.