They prove men can concentrate on two things at once.
Jerky.
O'Pressors
They just have a feel for that kind of thing.
Karma, Whores.
The matches are made for adults, but kids constantly grab'em and play with them. The situation is quite opposite with breasts.
Her navel.
Because it says "concentrate"
Because they are made to concentrate.
This joke. PS: You don't think so Prove me wrong.
To prove they can focus on two things at once.