Have you ever had a hard time deciding how you were going to work out? Like wanting to bulk or wanting to cut? Have you ever changed your mind 50 times a week?
Well it happens. But that's not the important thing. Wants important is your willingness to go after the goals you set and how you carry out the deeds necessary to what you want to accomplish. You need to have an understanding about your body and working out in general. You can't blame not lifting heavier or changing things up on being lazy. You aren't being lazy, really, you are just making excuses. If you don't want to put in the time and effort necessary, then find something else to do.
If you want to bulk, you cannot do 15 reps 3 times with a considerably light weight all the time. Your muscles get used to it. If that were true than roofers, brick layers, etc. would be huge, because they are doing the same thing with the same eight over and over. If you want size, you have to lift heavy, and shock your muscle; expose them to a lot of resistance. You have to change up your workout so your muscles don't get used to the excercise... You have to push and push them. So don't just rep and go for a pump, put on really muscle and show off some real gains.
