Dear Lufthansa,
There is an interesting discussion on another thread
Are all LH flights so warm?
among people who find the business cabin too warm on LH flights, some who have trouble sleeping. The question from that thread that I thought it would be interesting to ask here concerned whether it is appropriate and potentially helpful to ask the crew to lower the cabin temperature? Do you think that it is ... cool ... to ask? Any advice on a polite way to ask, recognizing that it is the crew's decision?