It sounds like you guys had sex on the second "date"? Listen, don't pay attention to TV. The concept of quick and easy sex is not liberating or powerful. All you have to do is browse these message boards to see....if you give it up too quick.....it usually doesn't work out. Of course there will always be the exception to the rule. Someone will answer this thread with their story how they slept with their dear husband of 40 years on the first date. Read these threads and you'll see that's not the norm.
Think of two teenaged boys for a moment. Imagine one boy works fastfood and cuts grass to save money to buy his first car. Imagine the other boy's father gives him a brand new car. Which boy appreciates and takes better care of his car? The one that earned it.
Boys/men; generally speaking, do not appreciate a thing that they don't earn or work for. Some more qualified to speak on this topic than I am have said that 90 days is a rule of thumb. That a guy is not usually going to hang around for longer than 90 days w/o sex if he's playing games.
He got it, probably realized how easy it was and may have started wondering: "Damn. If I got it that quick......how many others have gotten it like that?"