Warmth can help with relaxation during labour. When the body is cold, excess adrenalins can interfere with the secretion of endorphins - but all this has nothing to do with cold drinks or even ice cubes, which can relieve dry mouths as you breathe through contractions. Tweaking nipples will hasten labour. This is not just true in Bolivia. Oxytocin is released during labour, breastfeeding and sexual arousal.
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.