I realised that this guy constantly checks my last seen online status on WhatsApp. Why is this so?

I tend to wake up early in the morning around 7am, and would check my Whatsapp at the same time. That period is where most people would be sleeping. However, I realised that this guy would be online around that timing as well. Why is this so? I might be wrong though
I realised that this guy constantly checks my last seen online status on WhatsApp. Why is this so?
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