Well, you can always draw it, and whenever you feel like sharing it (or not, that's up to you), you can create a Tumblr account, or on another site, and post that on there, so people who don't want to see it do not actually see it, while people who do can go check your account on the alternate site. :3

(Sorry if I'm just unintentionally repeating what some other people might have already told you. *derp*)