I want to see all of the Saw movies, but I don't do good w/ gore movies. Read the details before you answer.?

Okay, so all of my friends LOVE Saw, but I just can't find the strength to watch them. I don't do good w/ gorey movies. I mean I can watch stuff like The Grudge and things like that, but blood and guts is not my thing. Could you tell me which Saw is the GORIEST of all the movies, and which one is the least goriest. Please and Thank you.