How Do You Measure Erect Penises

So yeah I want to see how big I really am, but I don’t know which measuring method to use.

For instance, if I measure it non bone pressed from the top I get 5 inches.
When I measure it bones pressed from the top I get 6 inches.
When I measure it from the sides bones pressed, I get 6.5 inches.

And when you’re measuring do you include the length hidden by your body fat?
If you do, does it mean that if you’re an 8 incher, you only have about 6.5 inches of “insertable length”?

Accurate Standard Of Measurement
measuring in general
Multiple questions about PE, measuring, and jelqing
Standardised measuring how to:

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