Tricking someone into handing something over to you
If you want someone to carry your books for you, you can do two things: have them fall head-over-heels in love with you (guys and girls in the friend zone will do anything to please their crushes, unfortunately), or hand them something while they’re busy talking to you.
You can also use this to trick them into handing over the thing they’re holding. There’s really no practical purpose for doing this, other than freeing your hands up. After they’ve stopped talking, they’ll notice that they’re holding something of yours or you’re holding something of theirs. You can have a good laugh about it later on.