My son was waist down naked for the first week of potty learning. Then we having been wearing sweats with no undies. We practiced a few times the day we started wearing pants and it took him about a week before he was getting them down with no problems. I still had to help sometimes when he had to really go. He would get them down a little and I would typically step in them and pull him out of them and set him on the potty.
Mama to Dillon '10 and Wyatt '12