The OP's comment used that as an example: ">>Free lunches _do_ exist as well, as anyone with a good friend or child will attest to. Then the reply: >> Those

The OP's comment used that as an example: ">>Free lunches _do_ exist as well, as anyone with a good friend or child will attest to. Then the reply: >> Those aren't free lunches though. They are paying with future reciprocity. So it's directly the topic in this thread, not just some random out-of-context personal attack, and I agree with jgome.