I personally think it's the respect part, like Curupira said. Because even the best of people will take advantage of others if it's offered sometimes. I guess I would have to say it's more of a "don't tempt the person to do it." In the same way that you shouldn't leave a $20 bill out when guests come over, you shouldn't have the potential of letting someone disrespect you an option. Because eventually, if they really respect you, they won't take advantage of you regardless but if someone continually lets themselves be walked on then over time the abusing party will begin to think that they SHOULD be able to walk on that person. And thus feeds into a really bad loop even if they weren't meaning for that to happen in the first place.

But as to whether it is love, I really couldn't tell you.