With all the bouncing boobs does your head bounce with them? Mine would.
Oh yeah, and the faster they jog the faster my head jiggles up n down... like one of those dogs you see in the rear windows of cars. 
They think you're acknowledging them which makes them all giggly and then they bounce all the more and so does your head which makes them think you're..
Actually, this one woman jogger, who was bra-less, she had to know I was acknowledging them. I started singing 'Poetry in Motion", so it would have been fairly obvious, I think.
.don't get me started.
What d'yer mean, don't get yer started? You started adoring chest orbs back in the 50's, like I did. 