Certainly not a comma. A billion is a thousand times a million. World War II is not terribly important. India's struggle for independence is a more passionate memory. You always expect marriages to be arranged by third parties.
Most marriages are religious ceremonies.
For men to have sex with other men is almost totally unheard of. There is a very small number of genuine homosexuals in the big cities. Anyone who is senior or higher in the socio-economic ladder must be addressed with great respect. If you're a woman, you are very modest with your dress. In some Hindu and Muslim families you may feel pressured to avoid visual contact with unrelated men altogether.