Question

What if a man remained unmarried.. What biological and psychological change would come within him? and why​

Answer 1

He would feel lonely and would not take part in any competition

Answer 2

This rules states that by dividing your own age by two and then adding seven you can find the socially-acceptable minimum age of anyone you want to date. So if you're a 24 year-old, you can feel free to be with anyone who is at least 19 (i.e., 12 + 7) but not someone who is 18.