Say they’re getting fully consensual, very convenient sex pretty much any time they want it, don’t have to work hard for it etc.

What makes them still have the desire to lie and manipulate women on an emotional level in order to make the women want more from them/be having false hopes?

I see a lot of male friendship groups (surprisingly fully grown men) do it for the sake of bragging that a woman is stuck on them, another theory is that they just enjoy having women wrapped around their finger and willing to continue to be at their disposal.

But say that a woman does anything for him anyway, and is treating it as casual as he is, and is enjoying it on her end - why does a guy still feel the need to try and pretend that he wants more just to turn around and laugh the situation off? What does he actually gain from that?

P.s. this isn’t person specific, I’ve noticed it in multiple men, from unprompted questions about marriage and long term goals with said person etc. with a strong hint of them seeing it with that woman very early on, when they are clearly only in it for the sex.

They already get what they want, so why the extra effort to purposely choose to be sly?