Keeping A Secret From My Husband

I've been lying to my husband about a small thing for months now. It's nothing big, but it bothers me because I know he wouldn't like it if he found out. See, I have this little hobby that involves collecting erotic novels and magazines, not just from mainstream publishers but also those edgier ones with more explicit content. The problem is, I've hidden these from him in a drawer where no one else has access, I'm worried that if he ever saw them, he would think there's something wrong with me or our relationship. We have great sex and everything seems perfect on the surface, but sometimes I feel like there's this secret weight pulling at my chest. It feels terrible to keep this from him when we're so open about most things.