Length difference when measured standing and sleeping

I am much smaller in length.
When I stand and measure my erect non bone pressed penis length it is 3.75 inch or 9 cm.
But the same when I sleep (lay on back) and measure comes to 4.15 inch or 10.5cm.
I am slight overweight and do have some pubic fat.

So question 1 is why there is length variation when measured standing vs sleeping?
Question 2 is how much length you all measured when you push against pubic fat?

If you measure BPEL while standing you will get your correct size, while sleeping you will notice that measuring BPEL you will lose some length. i have 15cm BPEL while standing and while sleeping my BPEL is 14.7cm . If you measure NBPEL the opposite will happen. When you are standing up to measure your NBPEL your fat pad is brought down due to gravity . The fat that is above your penis and below you belly is dragged down to you penis base , when you are laying flat on your bed the gravity pulls the fat pad in a bit hence you get some extra length.

Thanks for information.

I even checked your routine.

Its helpful .

Glad i was able to help.