I once dated someone whose father had a list of women's names tattooed on his upper arm with a slash through the ladies he had divorced or broken up with. I'm totally serious...there were at least five names on his arm. I always wondered how long he waited after a break-up to have the slash mark tattooed. Or perhaps he just came home with a slash mark tattooed over his lady-friend's name and that's how he informed her that their relationship had run its course. Either way, the approach above seems like a safer way to go.
*photo found here