I'm a big fan of British Page 3 girls Lucy Pinder and Michelle Marsh, mostly because they're very pretty and have great big cans. (Pinder is a bit amazonic, so she's my favorite of the two.)
I don't know why breasts are funny. Maybe it's because we all realize how absurd it is to sexually fixate on flabby bags of fat and glandular tissue. Perhaps it's because they tend to come in so quickly on teenaged girls, and we all have recollections of coming back from summer vacation to find that some skinny girl whose name we barely knew is suddenly massively stacked and popular. Maybe we laugh from anxiety because big boobs trigger a sudden limbic reaction? I don't know.
However, I do know that this video is funny. It's a behind the scenes look at a Pinder/Marsh photoshoot for UK "lad mag" Loaded Magazine. The most amusing bit is when the wardrobe stylist, "Hannah", is being interviewed. Hannah starts off very professional and detached, but then her eyes go a bit wide, she giggles and says "Their boobs...are GINORMOUS. They're SO BIG." Funny stuff.