They were always regarded as a bit 'girlie' at my (all boys) school. That didn't stop me buying them on the sly, though ;-)

And, as it was customary, nay compulsory, to share our 'bottom burps' with all and sundry, I can only assume that my 'air biscuits' had the same fetid, obnoxious stink-stench as everyone else's - otherwise I would have been rumbled!