How to metaphorize the limits in mathematics so that people without foundation can easily understand it

A one-month-old boy said to a one-year-old and one-month-old girl: "I love you". The girl said: "We are not suitable, the age difference is too big", the boy said: " No, your age is 13 times mine now. When I am two months old, you will be 14 months old, and you are 7 times my age. When I am one year old, you will be two years old, and you will be twice my age. .....As long as we stay together, the distance between us will become smaller and smaller!”