Or in your case, two!
And I do believe it is a matter of education. I helped a guy once when I was a teen -- his tire was deteriorating before our eyes, so I gave him a lift home. And he was very appreciative, offered to do work on my car in return, but my mom is so paranoid that she actually scolded me for doing so, and I don't think I could do so today. I feel terrible about it, but it's so ingrained at this point, and happens so rarely, that I'm not sure how to change myself. I did help a bunch of scary looking dudes with a jump once, they said no-one else would stop for them, so I told them -- they were probably just scared, were they alone? Yes, but you're alone, too. Yeah, but I used to hang out with scary looking dudes in the 90's, I'm alright with it. They even tried to pay me, and I just responded with, 'pay it forward'. So maybe I'm not so bad, but for every one of those, there are probably 3 that I kept going. I don't know...