Bless You

When someone sneezes, you say, "Bless you."  Right?

What do you say when you sneeze?  I say "Excuse me."  Seems pretty common, no?

My little sister, for as long as I can remember, has said, "Bless me," when she sneezes.  I tried to explain to her how the whole "Bless you/Excuse me" thing is supposed to work, to no avail.  That squirt makes me giggle.