Old wives tales.
Brazillian old wives´ tales:
-You will die if you eat mangoes and milk (created to avoid slave nightly plundering of farm areas during the slavery period)
-Mirrors attract lightning during a storm; cover them to be protected (some truth here: metal attracts electric discharges more easily than most other materials, including water. Mirrors were mostly made of iron back then).
-Pointing your finger to the stars will make warts grow on your fingers. No problems if you point to the moon or other planets, though.
-A recipe will not work if you mix ingredients partly clockwise, partly anti-clockwise. (This is true only if one switches direction so quickly that the entire container is not fully stirred).
-Wild boars will trample you to death in your sleep if you eat bacon in your bed past midnight.
-You will grow worms on your stomach if you sleep when you're really hungry.
-If a pregnant woman does not eat whatever food she craves at the time she craves it, the baby's face will resemble said food's shape.
-Drinking soft drinks under sunlight may twist your mouth permanently.
-Saying "Thank You" after someone says "Bless You" after sneezing will cause you to have bad luck.
-People who can draw "perfect" circles are insane.
-Ornamental elephants within your home are bad luck unless they face the door.
-If you are hit on the knee cap and your leg does not twitch, you are insane.
taken from here.
go read. haha