Why do you guys always keep asking about whatsapp?

Anonymous
I don't understand this why? Whenever I start chat with some guys, they always asking about whatsapp.
Do you have whatsapp? Let's chat there? What? We're already chatting here, and why I need to share my personal number with strange guy like you? When I say kik, they become silent? What the hell?

Can somebody please tell me about the purpose of this question?
And I'm never going to share my whatsapp number with anybody! No way.
Why do you guys always keep asking about whatsapp?
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