Nipple stimulation releases oxytocin, making contractions stronger and more effective. The length of the cut umbilical cord is the length the baby boy's penis could grow when he is an adult. Actually, the Hmong people believe these babies were very special monarchs in a previous life and they will be very prosperous, intelligent, high achievers in this life but when they die, they must take the caul with them to return back to their former high life. Taping a coin to the baby's belly button will prevent an 'outie'. The cord stump needs fresh air to heal, not binding with a coin or anything else.
Colostrum is useless.
Other cultures believe it is not 'real' milk. In fact colostrum is a cocktail of antibodies and nutrients so rich it has been described by scientists as baby's first immunisation. If you get scared, your breast milk will go sour. When you get scared, stress hormones like adrenalins may temporarily suppress hormones which release milk. Baby may be a bit fussy, but your milk is just short of a few fat molecules - not sour.