While nudity is generally regarded as an awesome thing, the fact of the matter is that it’s just not necessary for a lot of movies. Enter the gratuitous nude scene, where an actress strips down to her birthday suit for reasons completely unrelated to the plot. Frequently, these roles are covered by B- and C-list stars who like to add an extra zero to their check in exchange for giving the movie-going audience a thrill. While many big name actresses refuse to do nudity — a totally respectable choice, don’t get me wrong — some change their minds when there’s a chance their career can benefit from it. When those women go for a gratuitous nude scene, it usually takes one of four forms: