I have to suck these Chinese balls....
Attachment 101563
In an exercise to improve my lung function, I purchased this little spirometer. It's actually called an Incentive Spirometer. The incentive presumably is that by exercising your lungs with it you won't die prematurely. Basically, there are 3 balls in 3 tubes and you inhale to try to lift the balls to the top of each tube. One ball is easy, two is more difficult and then three requires the most inhalation.
You just need to imagine that the 3 shiny balls belong to 1.5 ladyboys and then suck as hard as you can.
On my first sucking attempt I sucked two balls to the top of the tube, and the third was quite difficult but achievable. So I'm happy with that and will continue to suck these LB balls every day until it becomes second nature!