Alice is helping Bob practice something like a sport or playing a musical instrument. Alice needs to help walk Bob through some motions. So Alice takes his arm or shoulder to put them in the proper position. Why is Bob blushing like crazy? And why does it take him forever to get it right? A common Ship Tease situation that can be as awkward as it is sweet. Because one character has a secret crush on the other, or because they are two adamant Just Friends, or because they're arch enemies, the necessary physical contact takes on much more significance than intended for one or both.