Um, I'm Confused: What's So Funny About 69ing?

Within the past decade, there’s been an uptick in jokes about the number 69. The joke is a reference to the sex position where two participants engage in oral sex with each other simulatenously, their forms resembling a sideways represention of the number 69. The jokes are a simple acknowledgment of the number, simply followed by the word, “Nice.” 

My question: what’s so funny?

69 is a noble position with plenty of perks. I’ve never really understood the hype. Seriously.