I have ridden double centuries, centuries, and countless 50 miles and under without using any butt butter. At age 50 a switch was flipped, and I am unable to ride 30 miles without it. Doc said it is because my skin no longer produces the amount of oil needed to keep it lubricated.
After using every available butt butter out there, I finally developed my own that lasts all day and night without a need to reapply. If you need it, you need it. If you don't, you don't.