For me it's simply getting in touch with a fem side that I feel I've always had that started to come out in my early teens. I love gorgeous lingerie and how luxurious, relaxing, and emotionally satisfying it is for me to wear it, which is the ultimate femininity in my opinion. I think my love of beautiful/romantic lingerie is what ultimately led me to wanting a boyfriend so I would have someone who would tell me how beautiful I looked in it and be turned on by seeing me wear it in addition to how beautiful I felt wearing it and therefore "confirm" my femininity if you will.