Guys, Why do some of y'all not reciprocate?

Why is it that some guys refrain from reciprocating while trying to pursue or even when you are already in a relationship with a girl, and by this I mean that some guy just let the girl plan all the dates, carry the conversation, send all the good morning/goodnight and thinking of you texts, be In charge of the entertainment in the relationship overall... why do y'all do this?
Like this guy basically.
Like this guy basically.
Guys, Why do some of y'all not reciprocate?
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