It's true that nagging comes from both men and women, I also agree with you that the women seems to nag more than men. Talking about nagging and complaining, I also agree with you that they are two different things but the similar thing here is that it has to do with display of displeasure while the other one which is nagging is a continuous or repeated outburst of the displeasure.

Nice content you have, thanks for the invitation, I'll surely post my entry.