Is it normal that i casually manipulate people?

I don't think I have some sort of personality disorder or anything, but it's been brought to my attention a few times that I have a tendency to manipulate people in a casual way. I use emotional manipulation mostly for attention. I feel starved for attention at home.

I don't get my jollies from trying to control people. In fact, I hate both the idea of controlling someone and being controlled by someone.

The kind of manipulation that I'm wondering about can only really be described by example. Take for instance the other day; I got sick of my brother leaving his dirty clothes all over the bathroom floor, but instead of just nagging him about it like our mother would, I manipulated him into changing his behaviour, not quite unlike the reverse psychology used on kids. If I confronted him, it would only start a blame game. He'd deny it, and we'd argue.

So instead, I picked up his clothes, put them in the hamper, called him to the bathroom and congratulated him on putting his clothes in the hamper for once. I told him, "I'm so glad that you're putting your clothes away now. It's so annoying when people leave them lying around. You're like the only one who's considerate enough in this house to think of those things. Thanks."

Suffice it to say, he's not left his dirty clothes around since. Why would he? If he did, he'd know he was letting me down and disappointing me. Why forgo the undeserved good reputation he had? After all, it's just picking up clothes (:

I do these types of things because they have an extremely high success rate, at least with my family and friends. But what I want to know is if this is psycho behaviour. Does this mean there's something wrong with me, or does everybody do this? So, people, is it normal?