I burp as a form of showing that I might be small but I can produce the biggest noises(applies to farts too).
I burp all the time...my family does too. I love burping. I really like burping to songs.
It's like this: My bro, he can burp loud, but his tone is crap. It's always that high pitch crap stretched out. Me, I can burp low or high, I'm adjustable pitch. I can project better too. My dad does burps in what he calls the "wow" way. He burps and it sounds like "WOW" most of the time. My mom does the regular "brp" type. My dogs do sort of a "bruuffffffff" sound.
My burps(like most of my farts) don't smell, they are all noise no back power. My dad's smell pretty bad at times, and he makes it worse by burping and quickly blowing the gas mass through the air to me or who ever he wants to smell it.
It's down like that...