My wife changes me all the time and diapers me before bed. She a family physician and doesn't mind at all. She actually encourages it because it brings her closer to me.
whenever i was 4, i remember my babysitter for the weekends while my parents were away always diapered me for nighttime. She would pull my pjs down and lie me on the bed, unfolded a diaper, lift my legs up and slide it underneath me, powdered me, then taped the diaper up, and then pull my pj...