Intention:

I want to put someone else's photo as my profile picture and see what reaction I get.

I'll put a picture of a friend from US on WhatsApp and only my friends from Turkey use WhatsApp, so they won't know about my friend. The goal is to see if people notice, how fast they notice and how they will react. Will they be surprised but amused? Will they be upset by the confusion? Or will they not care at all? There have been times where I put a photo of myself by myself, there have been times where I put pictures with someone else and there have been so many times I have put a photo of a food that I like or made since I really love food. However, putting a photo of someone else without me in the picture is not something I do, and it is not something people do usually.