I am not completely devoid of a sense of humor so I laughed too, but mostly at my husband who couldn't stop laughing. He immediately emailed the photo to our brother-in-law who telephoned 3 minutes later. Then they were both laughing and tossing puns back and forth across the miles like a couple of boys playing catch in the backyard.
Now, my husband bends far enough toward the erudite that I consider him cultured. He is educated; well-informed; listens to a variety of music from classical and jazz to Jason Mraz and Train; enjoys Dickens and Austen at the cinema, Shakespeare and musicals at the theater; appreciates a well appointed room and the aesthetics of a garden; and loves woodworking, photography, architecture and cooking gourmet meals.
However, humor brings out the boy in him. He isn't a fan of blue comedy but a smart fart joke gets him giggling, guffawing or, in this instance, gasping for breath.
I never raised a son, but I have a grandson, numerous nephews and great-nephews, and I taught 5 and 6 year-old boys in Sunday School for eleven years, so I know their propensity toward blood and guts and potty humor.
Apparently, they never outgrow it...although it was my daughter who started it.