I agree with poster that said sound of high heels. A more physical act that I categorize as a instant turn on is hand holding, but not necessarily that one of the hands is my own. I get jealously excited when I see male/female couples holding hands because I know how doing so has made me feel on the occasions that I’ve been able to hold a ladies hand. I think a lady reaching out for the gentleman’s hand or offering her hand to the gentleman has a calming and reassuring effect and then an arousing effect on the gentleman.