I eat and drink near my computer equipment, been doing it for years.
As you as you are careful, there wouldnt be any problems.
So according to you guys, Im not an computer enthusiast?
Just let him claim hes an expert, you are just letting him get to you. If he didnt, you wouldnt have posted this. He will learn as he gets older, instead of making fun of him, teach him so he will be more informative in the future.