Yeah, this post is a little unclear to me. If you are asking how to raise kids in a home where you have a tickle fetish, then I would say you do it the same as you do with other kink you might have, by keeping your business to yourself. As other people have said, you kid seriously doesn't want to know about your business. Even if he/she eventually becomes a teenager and is curious about the laughter coming from mom and dad's bedroom, they aren't going to be asking. Your kids do not and should not know about your sex life.
And if your question was how to raise your kids to have a tickle fetish, then you need to strongly reevaluate your priorities before you become a parent.