My fellow bant bois how do i go about break it to my shy & innocent gf I'm into some kinky sexual shit? I want to break the cute reserved timidness she has around me... and possibly have it lead to more expressive display of love without driving her off.

Like, she an absolute church girl stereotype.
she admitted to never having kissed a boy before me,
she always shies away as if embarrassed when I out right show affection above handholding in public
how do I get her to be more openly affectionate with me in the relationship, so i can eventually break this shit to her without freaking her out?