How to Introduce It—and When
If your child has a regular schedule of eliminating, we suggest coordinating nakedtime sessions for when he or she is more likely to go. If your child doesn't have a regular schedule, simply begin at a convenient time. Plan to start with peeing first, although of course you can never be sure this will be the first to happen. You can try to increase the odds by giving an extra cup of water before or during nakedtime.
When introducing the idea of nakedtime, parents should not present it as having anything to do with potty training. One of the best reasons for using this technique is that it is very passive and natural, so you should protect that atmosphere.
Talking to Your Child:
Mom:Hey sweetie, what if I let you do something wild and crazy? Wanna play this morning without wearing any clothes?
Dad: You don't want to get dressed in the clothes I picked out for you? How about if you just wear your birthday suit then?
Mom: Oh no, we don't have any clean clothes for you today! Well, I guess you're going to have to be naked for a little while until we can get this laundry washed!