Well, showerplay is certainly a nice, diplomatic, fun way around the situation. However, I would *not* suggest using Herbal Essences, or any other highly scented body wash. Many women's naughty bits are highly sensitive to that sort of thing (whether they know it or not). You could cause something as mild as some short-lived irritation, or something more involved like a urinary tract infection or yeast infection.

Get some unscented, gentle soap. Maybe some unscented Aveeno shower gel, or a simple bar of unscented glycerin soap. It may be tempting to use fragrance, but you will only be masking the scent anyway. If the area is actually cleaned, so much the better. Also make sure to rinse thoroughly. I'm a fan of the detachable shower heads... like a bidet in the shower, lol.