Got em on my pec tie ins, lats, bis, and thighs. Kinda goes with the program. You grow muscle faster than your skin can grow/stretch. In order to avoid them you would have to have some pretty slow gains IMO.
at about 22yo i trained like a mofo then went on an ethiopian diet then went straight onto a supergreek diet. biceps went from 12.5 inches to 15.75 in about 2 weeks lol - if the tiger clawed you, then it moulted all over me