Whoopsie Daisy Erection

Listen up, numb-nuts. The image shows a stereotypical nerd looking all surprised and saying "Whoopsie daisy! I have an erection." It's funny because it's unexpected for a nerd to be so open about getting a boner. It is a play on innocence vs reality. You probably don't understand what a nerd is or an erection is because you are regarded as 'special'.