So the lot across from your house is over grown with weeds and you decide to clean it up.  You get out your tools and get to work.  A few minutes later, a guy walks by and starts to talk to you by saying things like, "So you got tired of it looking bad?" and then he starts to help you out by pulling weeds for you.  Then another gent strolls by, your new friend and him walk about 30 feet away from you, huddle close to one another, and you see what looks to be an exchange of something.  You do not know what was exchanged, but their hands certainly met with more than a hand shake.  Then your new friend comes back and helps you out by using your weed whacker and doing a great job.  You take a break, offer him some water, and he offers some conversation about how he likes just to help people and pick up a few bucks here and there.  He says the barber down the street pays him $20 to pick up trash from the lot next to him.  So you know he's expecting money now.  After an hour or maybe a little more, you're all done.  What you thought might be an all day effort was just completed thanks your new friend.  Now, do you pay him for his work?  Do you give him a talk about drugs?  Do you offer to help him if he needs it?