Check out Toy Factory’s Equus page here.
This is what EQUUS’ poster looks like for West End version in 2007 starring Daniel Radcliffe as Alan Strang.
More about the West End 2007 poster here. Do take note of the author’s comment, ” it’s hard not to find it just a little bit disturbing.”, not erotic.
And more about Equus here (mind the Wiki link).