Why we had cheap double meaning dialogs in some recent Family Bollywood Films?

I was surprised when watching Bang Bang!,can't imagine why film-makers allowed such double meaning dialogs or why Katrina Kaif accepted them to shit on her,may be its lack of her knowledge of colloquial Hindi language.

Don't know why Farha Khan had "Madar....." dialog here definitely a sexist swear word demeaning women.If you are making a movie for family audience why needlessly insert such profanity or double meaning sexual dialogs.