so he shut the door because he did n't want to let the heat out ( his mother always said not to let the cold in , but that was scientifically unsound , seeing as the cold did n't travel , the heat did , but arguing with his mother was kind of like arguing with a pitbull right or wrong , it could cost you a testicle ) , and then took off his shoes on the doormat , and went to get another paper towel , but he ended up walking on some of the water and got his socks wet , and he yelped because it was really cold , and then he got a paper towel and wiped the floor , and debated whether he should change his socks or not , but he figured he should because it might be a while and wet socks in cold weather was really unpleasant , so he ran to his room and searched for socks , but could n't find any , and he did n't want to keep his father waiting any longer , so he ran back down , put on his shoes , opened the door , felt his testicles retract from the cold , walked outside , and closed the door on his way out .