" Hugging is quite an intimate contact. Considering the studies done on proxemics we looked at earlier; when you get within two feet of another person you are inside their intimate space. There are some people who truly do not want you in their 'bubble' unless you are close friends or they’ve given you permission. Assuming familiarity incorrectly can destroy rapport, make a bad impression, and risk everything you have done well up to then. "

― Susan C. Young , The Art of Body Language: 8 Ways to Optimize Non-Verbal Communication for Positive Impact (The Art of First Impressions for Positive Impact, #3)