Definitely panties. It's nice to pee with sexy silk panties on, the moment they get wet they are so comfortably clingy. Then again wetting in thick cotton panties can be enjoyable as they stay wonderfully wet after being peed in. But it can also be gratifying to pee in your boy cut undies as they give you a super soak, right down to your thighs. Peeing with no undies on is like eating supper with no food.