Sleep paralysis occurs as a person is moving into or out of REM (rapid eye movement) sleep, the deepest part of sleep. During REM sleep, the body is largely disconnected from the brain, effectively leaving the body paralyzed.
England and a few other countries start formal education at age 4 or 5. That's harmful and misguided.
Maybe because in Indian society the man is required to be financially more stable than the woman. Schooling gets over when we are 17 years old. After that a man needs atleast 4 years to settle down. Thats why I think that the legal age to get married is 21 years.