buying a bike in a few simple steps.
Step 1: Find a tape measure, ruler, or other device for standard units of measure.
Step 2: Measure your dick.
Step 3: Take the actual measurement and compare it to how big you think your dick really is. If the Imaginary number is much larger than the actual, buy a liter bike or a busa for your first bike. If the imaginary number is equal to or less than the actual then you will be just fine on a 600.