Skin is In
Skull and bones just aren't Barbara Bush Jr.'s thing. (She's the "responsible" twin, you may recall.)
Skin is more Barbara's speed.
"Skin" as in semi-public, semi-private nudity in mixed company.
The Hartford Courant reports ("Bush Twin Chose Skin Over Skull And Bones," by Kim Martineau) on family values, Christian morality, and personal responsibility and rectitude, Bush-Family style.