https://www.bmj.com/content/367/bmj.l5919 Hopefully this may help some of the guys that have been asking questions about
this subject. You will have to have somebody a lot smarter than me tho to explain. I can remember the urologist telling me in 2003 when I got reamed out just call if roto rotered you know like they do a septic line I said ok good enough for me. What bothered me was the nurse holding onto me during this procedure she said don't worry Sir I have participated in hundreds of these and they all look the same whether they are big or small and then she laughed which really helped to ease the discomfort of the situation. Just made me think of some of the great nurses and staff that I have had over the years and that my Mother had during her 6 terrible years of dealing with ALS! These people are truly special!
Larry