a friendly fee
A friendly fee is when you pay your friend to let you use their stuff instead of just stealing it and pretending you’re not a total scum bag.
I asked my friend to let me borrow his bike and gave him $10. He said I was the best friend ever.
I took my sister’s phone and gave her $5. She said I was the most generous brother ever.
I borrowed my dad’s truck and left $20 on the hood. He said I was the most responsible son he’d ever had.