High reps, lots of sets at the end of work out

[Klimax]

If you have good genetics and are taking alot of gear you can grow with almost all.
If you train hard the blood is pumped to your muscles also with few sets.

[manwitplans]

I was watching a BBer at my gym today. He finished of his chest routine with 9 sets of 15 reps of flies. 30 second max rest between sets. I asked him about this and he said it brings a sh!t load of blood into the muscles along with nutrients. This then stretches the fascia (no idea if thats the right word) which allows the muscle to get bigger.

My questions are

Should I include something like this into my work outs? I am no where near a BBer (yet).

Can this be used with every muscle group.?

Does anyone else do this? Weekly, monthly, from time to time?

Actually I have seen Cutler and some other pro recommending this lately (but 7 sets.. a program called muscle fascia stretching 7, or something..

Where you take isolation excersizes on the last and do 7 sets, in the manner you explained!

If you have good genetics and are taking alot of gear you can grow with almost all.
If you train hard the blood is pumped to your muscles also with few sets.

True that.