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    Q: I am going on an extended holiday to Thailand, rude to display foot sole?

A:

This is actually correct. Just like picking your nose in public is considered rude or disgusting in the UK. You will not go down well with the local populace if you display the sole of your foot or shoes. Therefore be careful when crossing your legs or resting your legs. Though it is highly unlikely to occur you should also not allow your foot to touch the head of another person, for this is another breath of etiquette in Thailand. Just as in the UK and US it's sometimes seen as rude to enter someone's home without asking whether the owner wishes for you to remove your shoes.