Men only do it once in their entire life. However, women do it once a year after they are 29. What is it ?

Answer 1

Celebrate their 30th birthday! The women keep lying about their age and telling people they are turning 30. This is meant to only be a funny answer obviously so don't troll me about it.

Answer 2

A man applies vermilion only once at time of marriage however a woman do it every year after she is 29 year of age.