Agreed.
People seem to be thinking that the weight has to be increased every set or stay the same. As you said, when you start to struggle after a certain amount of sets, just lower the weight. Your last set will be fairly light most likely, but it sure as hell wont feel light.
Exactly, thats what i usually do, i work up to my max for waht i can do for maybe 4 reps, because i dont believe too strongly in singles. then if i know i wont be able to pull the same weight for at least maybe at least 3 reps i'll knock it down a bit for soemthign i can manage more. Its really all about listening to your body, sure ya wanna go heavy as fuck, and i do, but ya gotta do it smart.