I'd have to trawl back through the many Bluestocking threads to verify this, but I thought you were one of the 'I only wear Chanel No. 5 in bed' brigade😄
Pockets in nighties hmmm🤔Don't wear nighties myself - nor Chanel No. 5, for that matter.
Well,
Firstly it is useful to have a tissue to hand instead of having to scrabble about on the bedside table for one in the dark.
Secondly, perhaps the designer is working on the assumption that the wearer will sometimes walk around in their nightie before and after horizontality, and the pocket could contain a phone, or earphones/buds, a book review carefully cut out of the paper to be read later at leisure, or an envelope picked up from the floor near the letterbox.
Thirdly, it could contain an emery board in case there is a little piece of nail catching horribly on the sheet😱
Fourthly, pockets are wonderful and every item of women's clothing should have them, full stop. If even nighties get swept up in that Universal Law, if that's the only way to guarantee that women get pockets, well sorry, you just have to live with the conundrum of pockets in your nightie, for the greater good.😄