Vitamin d is called the sunshine vitamin because: it calms our nerves. we must get it in our diet from plant foods that grow in the sun. it can be made in the skin by exposure to uv light. it is used to make serotonin, a neurotransmitter that enhances feelings of happiness.

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.  

well, it depends. it is natural to not fall asleep before 11: 00 p.m. teens need about 8-10 hours of sleep each night to function best.

enjoy your day!