Why do guys come back?

A guy I met from work seemed very into me and said we need to catch up, after we both quit that job. Anyway, I never heard from him for two months and just last week he contacted me again. He didn’t apologize for disappearing or give an explanation. Just sent me two horse videos he thought were funny. Because he knows I like horses. I’m pretty confused. Any thoughts from guys would be great.

Why do guys come back?
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