Why do most of the Indian Deo Ads employ Bengali ladies?

I am not sure whether all the women who acted in Deodorant ads are Bengali ladies or not, but one thing is common in all the deodorant advertisements when a well-sculpted man applies deodorant, women get attracted to him.

I do not understand what they want to prove in that ad ... that women fall so easily or man sprays deodorant not to keep away his body odour but to attract women !!!