This is not the first one that I have seen ladies in this kind of moment. I personally call this the COIN BANK moment.
It has been a mystery to me as to why some ladies do not feel that they already have their butt-crack exposed. It this by design? Did they by purpose not wear any underwear and wore low waist jeans? I honestly do not know.
I'd say that a 5 peso coin would fit perfectly in that crack.