Double Your "Ew"

What's with this trend of having female siblings and family members pose provocatively together? Does this bother anyone? The Olsen twins have been working the fused-pelvis, aren't we sexy (in a well-dressed lemur sort of way) thing for some time. Now, old photos of an American Idol contestant and her sister posing in suggestive clothing are hitting the net. Okay, that's not as nasty as the "Gastineau Girls" (mother and daughter) posing in a naked photoshoot together, but...oh...I think I just totally grossed myself out. Gotta go.