Why would a man talk about possibly having a kid with me after stating before that he never wants kids?

Me and him were conversating and he was talking about the idea of me and him having a baby sometime in the future but I looked him in the eye and shook my head no because I already have one from a previous relationship and I do not want any more. Then he switched up and said "yeah I dont want kids anyways I feel the more you have the less time you have to yourself." But why was he potentially entertaining the idea in the first place?

Why would a man talk about possibly having a kid with me after stating before that he never wants kids?
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