Do's and Don'ts
Do - take off your shoes when entering a home or a mosque.
Do - when invited to dinner take a tin of the local sweets (eg gaz in Esfahan).
Don't - use the thumbs up sign, which is the equivalent of the middle finger 'up yours'.
Don't - men should not offer to shake a woman's hand unless she offers first.
Don't - eat, drink or smoke in public during daylight hours of the 28 days of Ramadan.
Don't - touch the opposite sex except in an emergency or danger.