Pointing at people using your feet (Southeast Asia)
Although we’re not sure why you would do this, if you happen to be passing through Southeast Asia, refrain from pointing your feet at other people. In some regions of Thailand and Laos, the feet are considered the “lowest” and “dirtiest” part of the body, which is also partly why you should take your shoes off before entering someone’s house.
Touching people on the head (parts of Asia)
When in Asia, don’t pat or touch people on top of their head. Just don’t do it. In some Southeast Asian cultures, particularly in Thailand and Laos, the head is considered sacred, and you just never know what sort of faux pas you may be committing by reaching for it.
A quick handshake (Fiji)
When first introducing yourself in Fiji, be prepared – the handshake can be intense by western standards. After the initial firm downward motion, your hands may very well remain clasped for the duration of your conversation.
Stepping over someone (Nepal)
With feet considered dirty in much of South Asia, the Nepalese would take great offense to the act of stepping over someone, in particular, stepping over their outstretched legs. It’s best to just go around.
Shaking hands across a threshold (Russia)
In Russia, trying to shake someone’s hand across a threshold may quite literally leave you empty handed. In fact, trying to conduct any transaction at all across a threshold is probably not a good idea. Russian superstition holds that this is unlucky, and many times you will find that people either wait until they are invited in or you yourself step out.