sry, i gotta disagree bro.
you're stating the obvious, you really don't have much choice but to increase the load slowly, that's the nature of the game. and by doing five reps you are already over doing it, that's my point.
of course, it depends on if your a summer/ new years resolution kinda guy...if so, you can probably get away with it. but if your're a year round gym rat for years like me, you will be kicking yourself in 10-15 years. trust me bro... i know far too many old school body builders that wake up in the middle of the night with their arms stuck over their heads and can't lower it without some serious pain. or guys that can't even raise their arms above their shoulders in the first place... they all had the same mindset as you do now.
but like i said, if your just trying to add some muscle for the summer, keep your form right and you SHOULD be fine. for example, flat bench is an inherently dangerous exercise. EVERY torn pec i've ever seen was a direct result of the flat bench. i personally don't go below 10 reps. injury prevention keeps you in the game and making progress.
BUT heavy ass weight DOES build muscle...i just believe there are smarter ways of going about doing it.