Don't worry, I won't, I've just always wondered if it would work. The long haul bulkheads generally either tend to be full up with Bassinets - or completely baby free, and if the former I really don't want to run the risk of sharing a bulkhead with dirty nappies and stuff...

In any case, I've always found that the Check-in agents are generally very very helpful about changing the pre-assigned seats to give Plats the most comfortable options in Economy on any given flight.

All you need to do is ask nicely, and in French...