Abundant Milk

First, your "over abundant milk supply" is a good thing! It seems that your son may have difficulty with controlling the forceful flow of your milk, which he will outgrow. Trying different nursing positions may help, such as the football or side-lying positions. It may help to tilt your son in a upright position while nursing, his face slightly above your nipple. By nursing "uphill," it may be easier for him to control the milk flow. You can also try to nurse more often and burp repeatedly during each feeding. Finally, expressing some milk before he latches on can take away some of the force of the letdown.