If you are asked out by a co-worker and turn them down, keep that quiet too.Don't boast about your pulling power and don't mock the afflicted. Stress: The most effective way of stopping all those hormones and testosterone in their tracks. Good stress-surfing brings about the old adrenalin rush that can engender frisky behaviour, but negative stress can make you too tired and anxious even to notice the sex of the person working next to you, let alone fancy them.Be light in tone but clear about your intentions (not all of them, of course).Allow them to see that you want to put the relationship on a social footing, thereby also allowing the courtesy of letting them turn you down too. Take no to mean no and never cajole, push or ask for an explanation. Plan a semi-jokey line that will immediately alleviate the atmosphere between the two of you and restore normal working relations.