Some experts say the mercury in sindoor helps cool the woman's body down and relaxes her. It is also thought that the metal helps control blood pressure and boost sexual desire in women a possible scientific reason why widows or unmarried women are not allowed to wear it.
I have heard this. But I have never payed much attention to it.
@bold
But this line is definitely annoying to me. Who are these people who allow/disallow I want to know. So that I can give them a piece of my mind.