Gig 601XL Builder schrieb:
The position of my head was never mentioned in any flight training I ever
received with the exception once I was told to get it out of my ass after a
particularly bad crosswind landing.

I was emphatically tought to really move my head around all axes to have
a complete look out in all directions, especially to look over my
shoulder before initiating a turn (coordinated or not), and even more so
while thermalling in a gaggle with ten other gliders.

Conversely, I tell first time passengers not to move their heads at all
and to concentrate at the horizon, especially while thermalling, to
enhance the chance of keeping that certain bag empty.