What is common in these sexy girls?

What is common among these three sexy and semi-nude girls?

Could not find? Oh this is not so difficult... Take a very close look at these sexy sirens... Do you see something common?

Still nothing seeing? Shae on you yaar... How can you miss something as important for a man?

Now got it? Its nothing but their sexy circular perfect shaped boobs man! Take even more closer look at their undies... Something happening in your pants, na... :)