i didnt get time to read all the replies...

but I just want to say that Lifting weights and making strength gains DO NOT CORRELATE with "Bulking"

If you are in calorie control there is no excess to grow...so you get leaner and harder (what u want)

The term "bulking up" is somewhat used in the incorrect way as far as bodybuilding is concerned, in this post. In the past this practice was common but most serious bodybuilders don't "bulk-up" during the off-season anymore.
Bulking up means eating lots of foods and adding both lots of muscle mass and bodyfat. The first is desirable but the last is not as it's hard work to shred it off for a competition or even just to look muscular for the summer season.

The added size one feel after training a bodypart is from the blood gorging the muscles and it's actually a great feeling. But if one continue to train and lose the "pump" all of a sudden, it means one has overtrained. It's the body's way of protecting agains rupturing the capillaries.
High reps except for calves has not showned itself to be an effective way of increasing muscle size. A much better approach is to do 6-12 reps with short breaks.

So why the scare many have about getting too big muscles? To begin with, the muscle monsters we see in magazines are genetic superiors on the one hand and abusing anabolic steroids, HGH and even insulin on the other hand.

Also keep in mind that a greater level of muscle mass is active tissue that require fuel to sustain itself, even in the relaxed periods. Fat just sits there and need no such attention. That is the reason a 250 lbs. bodybuilder with low levels of bodyfat can eat lots of calories and not gain fat...as long as he continue to train with weights.