This is commonly used as a “polite hug.” It’s often shared between family members and typically has no romantic implications.
Yeah, the side hug’s not exactly popular. It’s an effort to avoid awkwardness, which makes it much more awkward than any of the other hugs on this list. Occasionally, the person administering the side hug will also pat the other person’s shoulders; typically, they’ll follow this up by awkwardly shuffling away towards a tray of assorted cheeses and crackers.
Look: you don’t want to be a side hugger.
This is a playful hug, but it has undertones of protection; you’re sheltering your partner from others. It’s a very intimate hug in any setting.
Of course, it’s also the hug you use to subdue a bank guard before robbing a vault. Note: this only applies if you’re some sort of a bank-robbing ninja.