It just takes a little common sense and decency. Never call anyone in the middle of the night. And never, never, never call anyone to harass them or make a nuisance of yourself. As for the phone contact you make after your simple date, always wait at least two days before you call your new friend, unless they specifically say they want you to Campaign matchmaking halo mcc earlier. If you call the next day, you may make them feel smothered with your attention.