why do people feel obliged to say bless you EVERY FUCKING TIME someone sneezes.

i have hayfever for fuck's sake- not the plague or the black death- and so i sneeze alot. get over it. i don't want to be blessed by some fucking god that you don't even believe in. i get bored of hearing it, so my colleagues should get bored of saying it.

also: should i say thanks when someone blesses me? because i gave that up along time ago. i didnt ask for a blessing, so dont see why i should appear grateful for it.