Maybe I would word it this way:
Spray cologne where your skin is exposed. In the summer, IMO, it is best to spray your wrist. Hold up your arm, spray close to your skin so that it runs down your arm. Last along time that way. If you wear long sleeve shirts, then you really only have your neck, or behind your ears (which is nice if you are in a club when a hb whispers in your year, she can smell it).
If you are not wearing a shirt in the summer, then you can spray it on your chest (or armpits).