S.L.
My daughter who is 5 going on 6 yrs old does not like Pj's and will not sleep in them when she is at home. She will go to bed with them on but takes them off because she gets hot easily. She does know that when she goes to Grandma's, or to her aunts for the night that she has to wear Pjs. I let her sleep in her pull up at night because she goes to sleep faster and then she keeps ehr blanket on too all night. I agree though, have him pick out a special pair of jammies just for sleep overs and tell him that they are his special ones that will help him fall asleep faster and keep him comfy at night there.