Seriously. You have to take this seriously. It's not a fun topic and you can't make it fun. What will you say to the judge in court when you are asked your sexual harassment policy? "We make the men wear silly ties." We are in an era of litigation. Punishing employees like children won't work. My suggestion is have a written policy with an escalation process. Then follow said process. You should already have this and policies for other issues like treatment of people with disabilities. You should also have periodic training/education at least annually. Oh yeah, if you don't already have one, get an attorney and have your policy/training reviewed.