Your central and peripheral nervous systems depend on certain cells that are sort of the unsung heroes of the nervous system. These cells that form myelin, protect, support, and maintain equilibrium in your nervous system are called glial cells. They are also commonly known as neuroglia and even more simply glia. In more detailed terms, neuroglia are cells in your nervous system that are not neurons.
Yes, us Muslims are not allowed to date but some Muslims do date but it is not allowed in Islam. We are not allowed to date because two people who don't know each other are not allowed to be alone because something sexual will happen and that's not allowed in Islam until you get married.
Other countries only permit marriage among the young for certain groups. For instance, according to the US state department's humans right report on Trindad & Tobago from 2014, though the official marital age is 18 for men and women, Muslims and Hindus have a separate Marriage Act. Muslims are permitted to get married at 16 for men and 12 for girls and Hindus at 18 and 14.