I have had beads since 90's, won't leave home without them. Granted on cooler days my butt gets a little chill, but on hot days there is air circulating down there, which evaporates water, which causes fabric to stick, which contributes to monkey butt. Sally didn't want them for the longest time until I put mine under her and then I had to buy another set.
I have 24,000 miles on the 07 with the stock seat. I am using the same beads I bought in '93. I keep moving them from bike to bike.
I did try sheepskin, I found that when it was cold and dry the sheepskin was great. After that it was no help at all. When it got wet it smelled and held water until you could dry it, even after it rained and the sun comes out you still need to wear your rain pants. When it was hot out it did not allow any air to circulate, nor did it remove the heat from my butt, causing sweat. Then once in a while you have to wash it, comb it....
Friend from GA has a reworked car bead seat on his harley, does 25,000 miles each year on it.
Beads just sit there for years. Yep, beads are the way to go.
www.beadrider.com
(no affiliation, just a satisfied customer)