Why do some guys do this?

I've had this happened a few times and it's mostly with guys I've known in the past and don't talk much to……

I post something spicy on social media and they hit me up but when I reply they don't say anything. They don't even like the post.

I had a past coworker I used to talk to and he left my message on read weeks ago but when I posted something he replied to my message.

Why do some guys do this?
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