It's slippery and slidy and relaxing. It feels good trickling over our bodies. It's also one of our favorite forms of foreplay. Problem is, you can't just jump into the water and have intercourse. Water washes away a woman's vaginal lubrication, which can make penetration uncomfortable.
Hot water can also damage latex condoms and wash away spermicidal foams, jellies and creams.
Dim the lights. Spruce it up a little by lighting scented candles and placing them around the room. Try adding fragrant bath salts or fresh flower petals to the water as your run the tub. Bring in a portable CD player and plug it in a safe distance from the water. You've created your own erotic spa.