a.The individual (usually male) holding a girl on his shoulders at a concert to facilitate her "flashing".
b. Degree of which being proportional to the amount of photography and strangers copping a feel.
Dave held his wife Mary-Sue on his shoulders at the Lynard Skynard concert so she could flash the band. The crowd all took pictures and felt her up. Dave was a really big Concert Cuckold!
A man who is truly a Cuckold but hides it from everyone including his wife. He knows his wife is having an affair but pretends not to know because he can't resist the thought of her with another man.
Marc is such a closet cuckold, he knows Bill is fucking his wife but pretends not to know.