How can I tell my boyfriend i'm into light -_-?

I've been with him for a few years now, and I'm pretty sure I won't really SCARE him away.. But I'm a bit embarred of my , even if it isn't all that . He's very ....er... not dominant over me. He seems to have a really bad fear of hurting me... and if i try to subtly tease him into restraining me at all, he just flat out won't do what I'm teasing him to do. ._. I know he finds weird.. he's told me. So I'm wondering if I should just not tell him at all... I don't want him to look at me differently.