I've been seeing a lot of debate about the relative merits of female armpits in photography of late, perhaps proving that a lot of people have too much time on their hands.
The argument seems to go that armpits are not the most attractive part of a woman and therefore should not be exposed in a photograph.
While posing of subjects is a matter of personal preference and personal choice I don't see anything wrong with a bit of armpit action in a photo of an attractive model. The habit of a lot of newer models to give a double armpit flash in a "hands behind the head" pose is perhaps a bit too much. The jury remains out on this weighty issue :)