From 24 years, a girl’s age is considered as a geometric progression with minimum common ratio of 1.1. The common ratio is itself a very sensitive random variable for each girl which can vary based on societal pressure, peer pressure, blood pressure or anything and everything. Since |r|>1, it forms a divergent geometric series but we can try stopping it with approval from society at nothing less than a marriage.
Thanks to mathematics, random process and society.