[sadomasculine]

Here's a few of varying difficulties:

Easiest (my ass): http://three.flash-gear.com/npuz/puz...461&k=54732906
Moderate (my red ass after a beating): http://six.flash-gear.com/npuz/puz.p...461&k=87383908
Hardest (my whole body): http://six.flash-gear.com/npuz/puz.p...463&k=14831991