Why do some men enjoy future faking?

I've been lately reading about this a lot. It's about these men that are in a relationship and purposely string along women, promise to form a family one day but it's a lie the whole time.

I understand the girl is at fault too for letting it drag on for too long. But now I want to focus on the man that's lying to them. Why do they enjoy doing that?

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If he wanted sex, then how about get it on with girls that are into casual relationships. Why look for serious-commitment type women?
Why do some men enjoy future faking?
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