At my work I have to fill out a "manifest" every month with the names of all the people I did sexual relations with. If anyone appears on the manifest who is not my spouse, I get a punishment. (Also get a punishment if I falsify the manifest.)
Here's a quote from the employee handbook explaining the policy: "If you are a 'player" at romance, then you will probably be a player at the workplace as well. But education is not a game (that you play), it is serious business."