Because everyone is shallow sex maniacs in the real world? J/K but truly how often do you just throw yourself at other good looking people instantly diving into a sex relationship or showing sexual interest? The Mc and the girls might not be blood related but have felt like a "family" in the past. Personally I prefer way more corrupting/taking advantage of story lines myself but this game is just well done that I got into it even though it not my favourite style.