When you meet someone for the first time, you have everything in the world to talk about. Your relationship, whether professional, personal, or romantic, is essentially a blank state. You get a chance to fill that slate with all sorts of wondrous conversations.
And yeah, you rarely have to worry about hugging (assuming you’re an awkward hugger, like me). Handshakes are perfectly acceptable on the first meeting.
But when you meet someone for the second time?
Now, there are expectations (not the least of which is whether or not the other person has upgraded you to hugging level). Here’s a partial list of all the things that can take a turn for the disastrous when you meet someone for the second time: