So i had a question,but i might be judged for asking it and i may even regret asking this,but im too curious so im gonna ask it anyway.But to ask this question i feel i need to give some context as to why i am asking it. I was in the shower and got the urge to pee.but the piss did not come out of my penis, so i sprayed it with warm water.But i wondered;

When i spray warm water on my penis, does the outside expand and the inside channel gets larger, or does the outside not expand but the inside does and it shrinks the channel.

I know, insanely stupid question but im really curious.

I work in a BSL2 lab that will be using lots of HBV at a concentration of 4.5e9 GE/mL. I wanted to calculate the viral load of this in context to what is naturally found in an infected patient's blood measured in IU/mL.

HBV 1U = 5.6 copies/GE

High patient viral load = >20,000 IU/mL

Patient HBV concentration: 1.12e5 GE/mL

4.5e9/1.12e5 = 40,178X more concentrated than patient blood?

Is this calculation correct? If so, does this change the nature of working with such high concentrations in a BSL2 (taking enhanced precautions - BSL2+) environment due to aerosols despite this being a blood borne pathogen?

Thanks for any insight or guidance on this topic