"I have been in quite a few (sex scenes). The thought of Margaret Thatcher usually does it for me, in terms of never getting excited. In (1999 movie) Titus, there was an orgy scene where we had an Italian women's gymnastic team - naked - moving around on top of us. Mrs. Thatcher played an integral part in that scene." Welsh actor Matthew Rhys conjures up an image of Britain's former prime minister whenever he has to film sex scenes.