Doctors recommend to let your gasses out naturally cuz if you hold them in that in the long run it effects your body..holding your farts is known to cause hemrroids..so why don't ppl jus let it out even thou ppl are around?
because thats just plain NASTY. i mean not only is it gross but the stench that comes from some people from that is unbearable. its human nature just to not do that.