Americans do not like to be touched
“Don't touch people you don't personally know. Hand shakes are just fine but don't hug or kiss, and be careful of your limbs when in a crowded bus or train.” -- Dean, USA
“Don't assume we like to hug all the time. Do so only if you know the person well, or you know the person is okay with it… If you see us take a lean back or step back, it's a hint that you're a bit too close. A distance of around .75-1 m is pretty decent if you're in a line or queue. And of course, if someone says something about your distance, I recommend you step back or you're going to get dinged as a creep.” -- Joan, USA
Do not talk about politics
"Don't talk about politics.
Do not mention political candidates.
I hope I've made this clear." -- Kyle, USA
“Don't take a side politically, racially, religiously, or sexually. It's ok to discuss these issues with people you know well enough but if you take a strong stance on one of these hot button issues, you may be seen as an another outsider trying to force their 'more sophisticated' opinions on us. Just enjoy the conversation for what it is, conversation.” -- Ted, USA