<prompt> Human: About once a month my friend will Paypal me 20-50 and ask me to send it right back to him. Ive asked him why but he refuses to tell me. What possible reason could he have for this? Is this some weird money laundering thing? Should I be worried?Edit: I asked him again and he said cycling a small amount of credit line between liquid income and pay it back before interest. Not really sure what he means.  <response>: Ive asked him why but he refuses to tell me.Tell him to stop sending you PayPal money. If he asks you why, say Because you refuse to tell me why, and if you do it again, I wont send it back.I have no idea why he would be doing this, but it doesnt matter. If he cant explain to your satisfaction whats up, theres no reason for you to participate in it. 