burping on command

"Can you burp for Mommy? Do you have a nice burp for Mommy?" That's what I usually say in my sing-song voice when I'm patting Daniel on the back after I feed him. Lately, I'm beginning to suspect he actually knows what I'm saying. In the past few days, he's been looking at me, then letting out a big, healthy burp ... almost as if he heard me, then summoned up a good one for the occasion. Could farting on command be on the horizon? I hear boys like to do that. :)