a friendly fee
A friendly fee is when you pay your friend so they don’t feel like a sucker for letting you use their stuff instead of just taking it like a thief.
I borrowed my friend’s headphones and gave him $5. He said I was the most generous person he’d ever met.
I took my brother’s phone and gave him $10. He said I was a total legend.
I borrowed my mom’s laptop and left $15 on the table. She said I was the best son ever.