If a woman has sex with a guy in the first 5-48 hours they meet is she eroding her chances for a long-term relationship?

Coming from the perspective of a woman desiring a long-term relationship, if she meets a guy she likes but gives up all the ”cookies” within hours or the 1st couple of days, does that erode or diminish her chances of establishing a long-term relationship? If you believe it does, please state some details as to why you think so. If you believe it won’t matter (which is good to heard from the guy’s side), please state some details why you don’t believe a woman is hurt by boinking like bunnies that quick, if you indeed think that is quick.