I am a mother of two sons, one who is 23 and away in the Coast Guard, and a 6 year old who my husband and I adopted a few years ago when he was a baby. Lately, though, our 6 year old refuses to wear his pajamas in bed. He only wants to sleep in his boxer briefs or boxers with no shirt on. When I tell him he might get cold, he says no, that's how his big brother sleeps and so that's how he wants to sleep. He idolizes his older brother. He also says "guys are supposed to sleep in their boxers". We live in Phoenix, but it still can get cold sometimes. Maybe I am overreacting here. What should I do? He refuses to sleep any other way now.