If all goes wrong between the two of you, you need never worry about a stalker-ex situation. Rest assured that you'll never have to wake up one night to a tap-tapping at your window by a bedraggled creature who'd fit in well on the set of The Ring. Instead, you can be sure your runner will be tying up their laces and getting over you with a quick 10k PB. Your hot, selfless, beer drinking, pizza munching ex will be skipping round the streets, and you'll be alone. You'll probably never want to let them go, actually. Got any other great reasons why you should be dating a runner? Have a say in the comments below...