So to summarize: your dick is so long that it’s going to touch the toilet if you sit, and it hovers at just the right angle so that it will dip down under the level of the rim and then back up again into the underside of it. Unique problem you have there.
I think you misunderstand the issue.
Unless you actually really clean the inside of the toilet bowl after every time you take a piss?
Did you know that when you flush a toilet, the bowl gets rinsed with clean water
Have you used a toilet before? The rim doesn’t get cleaned
So to summarize: your dick is so long that it’s going to touch the toilet if you sit, and it hovers at just the right angle so that it will dip down under the level of the rim and then back up again into the underside of it. Unique problem you have there.
Stop being obsessed with my dick and go pee upside down if you like.