My Mom had tons of Old Wives Tales and considering that she graduated from high school in about 1936 and married in 1941 I always considered the source. But lets see-- If a woman lifts too much her uterus will fall out uuummmm didn't happen.
If a woman exercises too much she will grow a beard and her voice will get deeper, she will develop manly looks---didn't happen.
If you sit on a public toilet seat you will catch VD (STD). never happened
Both my parents told me this one -- every hour of sleep you get before midnight is worth 2 hours of sleep after midnight--uh huh debunked.
This one I read -- If an expectant Mom raises her arms above her head --her baby will be born with the cord wrapped around his/her neck.
A neighbor (from a 3rd world country) told me if you tap the spoon on the pan after stirring the food the baby will be born with crossed eyes. debunked
Seriously, as a sleep deprived Mom if someone had told me to stand on my head in the corner and recite the Declaration of Independence backward and my baby would sleep I might have tried it.
Several years ago a friend of mine rolled out of bed on her hubby's side and was having a bad day---------- so she got back into bed and then out again on her side to improve her day. She actually believed it worked.
Sometimes it's the placebo effect. A person is told something will happen if they do... and after they do .... it happens because they believe it will.