i've had experience that a few of mine like to play in the shower with me. but they seem to be far and few between. i once had a baby boy (either Leonard or Lyman, i can't really remember which) who would almost fall asleep in his bath. he really loved getting the soap massaged into his fur and would bruxx and boggle like a fool. so i think its fair to say that some rats like the water though they seem to be rare. the only way to find out if your rat likes it though is to try it and see.
Start young. The younger the better! Not just for bathing either! Give them LOTS of vegies and other foods thet are good for them at as young a age as posible or they might not eat them when they're older.
Anyway!! I've never had the "pleasure" of having a ratsy that liked water... exept to drink!! :lol: