The first dirty joke my sister ever told me concerned a newly married bride, who on her wedding night pulled her Mother's choice of night attire for her from the suitcase, and said in some alarm.....URRRRGH!ALL PINK AND CRINKLY!

To which her new husband said, Oh you!You promised! no peeping!

I was about five at the time and it scarred me for life. perhaps Henry is recalling a similar trauma.