I think you should go for it and, relying on an extraordinary crew, they - and yourself in turn - will have a most memorable time to recreate the moment.
If they are discreet about it, and you as well, it should all work out. Itīs all about communication and karma.
Bring yourself a very nice dessert cake as well. Enjoy your Historic Premium First Class flight!
--HNL1K
Ps And I know what I am talking about... when United got rid of their Intl First Class......I did the same