Boil fresh corn for 5 minutes until tender.
Cool corn completely in cold water bath.
Cut kernels off cobs with sharp knife.
Dice red and green bell peppers finely.
Chop red onion into very small pieces.
Mix mayo, vinegar, and sugar in bowl.
Add salt and pepper to dressing mixture.
Combine corn and all diced vegetables together.
Pour dressing over vegetable mixture evenly.
Toss everything together until well coated.
Garnish with fresh chopped parsley on top.
Refrigerate for 30 minutes before serving.