Many of these items you'd find in the kitchen feature crude humor. The designs speak loud and clearly for themselves, but don't have very nice things to say.
It's easy to empathize with objects that have to perform mundane tasks on a daily basis. Dish towels, they have a hard life; if they could really talk, they'd be very vocal about their dislike for chores like doing the dishes, and coffee cups would grumble obscenities right back at you before you've had your cup of wake-up java.
Other examples of crude humor include transformations of innocent-enough kitchen equipment like lemon reamers and tea cups into obscene objects that resemble parts of the human body. Imposing suggestive human body parts or rude text onto these mundane kitchen objects makes them instantly lively, however bawdy they may be.
25 Crudely Humorous Kitchen Tools
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Vulgar Cursing Mugs
Cheeky Sitcom-Inspired Cups
Bitter Badger Meme Mugs
Temptress Teacups (UPDATE)