It’s important for your son to really taste sperm. You don’t want to just shove it down his throat all the time - it’s essential that it rest on his taste buds so he can fully absorb what it is about your dick juice that is so powerful and almighty.
If he claims not to like the taste, then it’s probably because he hasn’t sampled enough variaties. Bring your friends over and have them all jizz in his face hole. NO SWALLOWING until everyone has made a deposit.
Then let him revel in the flavors of many different men and the copious amount of mucusy cock snot they offer him.
Your kid is bound to change his tune. If not, at least he can’t complain with a mouthful of cum!