in the shower was never something I particularly enjoyed. Foreplay
in the shower, on the other hand, is one of my favorite activities.
There is a lot of exploration to be done while soaping up your partner. The simple act of touching them, sliding your hands over every inch of their being, is very erotic. Pressing your bodies together in the pseudo-rainfall, kissing slowly and passionately, can prepare you both for an evenings worth of pleasure.
Sexual intercourse in the shower, on the other hand, can be uncomfortable. The water washes away her natural lubricants every time you partially withdraw, which can lead to a friction burn. Unless you're an avid shower-sex person, there is no place to be comfortable. The shower floor can be very slippery.
A good compromise between these two practices can be oral sex in the shower. It can be tough on your knees, but the sensation of water running off your bodies can extend the experience for both the giver and the receiver. Continuation of the festivities after the shower can start with the toweling off process, leading into some very mutually satisfying lovemaking.
Your sexual mileage may vary. Remember, if sex is outlawed, only outlaws will have sex.