Same thing happened to me. I started lifting a ton, put on 40lbs of muscle and suddenly I wanted my gf to grow her bush out. She was fine with it and man our sex got much better, plus she has super sensitive skin so shaving and waxing irritated it. Last winter i convinced her to stop shaving entirely and I have never been more attracted to her. Something about seeing her body the way nature actually intended it to look activated my caveman brain and all I wanted to do was fuck