<human>: Give me a shortened version of the text

I stopped off at 7/11 on my way home from work tonight to grab some milk, and there was a guy standing by the door asking for money to feed his kid. I usually ignore these people, but I was feeling charitable tonight and this guy had a clean shirt and all of his teeth so I thought "Maybe he's just down on his luck." You know, pay it forward and all that. So I handed him a $5 bill and went inside to get my milk.

As I'm walking out of the store, he stopped me again. I thought maybe he was just saying thanks, but he asked "Hey man, are you over 21?" I couldn't believe it. I was in a great mood, and this dickhead blew it in less than 2 minutes. I looked at him and said "Are you fucking serious man? I just gave you $5 less than 3 minutes ago because you said you needed to feed your kid. What kind of baby food do you have to be 21 to buy?" He looked embarrassed and said "I'm sorry man, I have a problem." I told him he was about to have a big problem if he didn't give me my fucking money back, and surprisingly he did with no resistance. It must have been the uniform. Anyway, fuck liars.

**So what have you done for your fellow man, following your heart instead of your head, only to be taken advantage of?
<bot>: Gave a homeless guy $5 to "feed his kid", 2 minutes later he asks me to buy alcohol for him.