Most singles who are looking for a meaningful relationship won’t date multiple people once they’ve become intimate with someone.”READ MORE: Meat lovers, vegetarians and vegans — can people with different eating habits date?

A good rule of thumb is to always act as though you're having an affair.

If a guy gave you a mix CD of Radiohead songs because it felt like giving you "a pint of his own blood," and then he gave girl a pint of his own blood, it sort of cheapens the gesture. I know guys who date multiple women like they're filling out an elimination bracket, and I know guys who date multiple women because they get easily bored by one set of nipples.