Why do stupid oldies prohibit ppl from drinking water after coming from hot sun?

i have experienced many oldies and there lousy followers who never allow us to drink water when i return from a hot day. Just imagine how barbaric it is... I come home tired after a lot of work in sun when i long for water they stop me from drinking water nd leave me to starve in thirst. They say i should drink aftr few mins nt nw. Wats the point in starving more?? Is there some herbal or yoga mumbo jumbo behind this??