I think one of the problems here is the way in which many people "bulk".,
Many poeople see this as an opportunity to eat Dominos Pizza, Burger King, Ribs, Mexcican Food ... and just generally pig out.
Now are there guys who CAN do such things and not get totally fat and bloated. Yes.
But similar to the genetic anomalies which allow some guys to look like Mr Olympia contenders, only SOME, FEW guys can eat like total crap and stay lean (or at least leaner tha Fat Albert). And/or they are on a mountain of gear at the time.
Some of the "bulk" methods advocated here and by some members are ridiculoius. "Yeah I go to Burger King and eat 5 whoppers with cheese". Please - that's not bulking, thats just being a pig.
If you eat well, clean, with a good balnce of carbs (not all starchy, bread and sugar crap) which includes fruit and real veggies, along with a lot of protein and some good fat (meaning don't just eat beef all day with lot of fat, get some mix of protein and also get some good EFAs using like Udos's or Flaxseed oil least) then you will be able to probebly put on muscle (if training and RESTING properly) without too much fat.
BTW, the bulk one week and cut the next method ... LOL .... well if you "sorta try" to do 2 different things you end up doing neither very well at all.
I think, again, that the "bulk" mindset of eating TONs of ANYTHING in sight does more harm than good.