Can peer pressure be positive? Why or why not?
Of course it can be good. One might associate peer pressure with only bad things, smoking, drugs, mob action...but in reality your peers can influence you for good also. If you hang with good people you will get good peer pressure.
I try to hang with good people now that I'm older and wiser.
Are all my friends "good"? No, but I try to limit contact with those. I still love 'em n stuff but I know I will benefit more by "walking with wise persons". Age does have its advantages.
Proverbs 13:20 says it all.