Susan Sarandon doesn’t think about age or gender when it comes to relationships. The 78-year-old actress – who was previously married to Chris Sarandon and has daughter Eva, 39, with Franco Amurri, and sons Jack, 35, and Miles, 32, with former partner Tim Robbins – isn’t too concerned about such “details” as she only wants to be with someone who has an “open heart and open mind”. She told the Sunday Times magazine: “There are different people who are, you know, younger, but have lived a very full life that are more mature, more interesting. “It’s very hard to find a much older guy who’s still …