I know my hands hurt quite a bit for several days, after a day or two of trimming in big wind. I have to wrap the sheet around my hand at least once or twice to get a tight enough grip to trim it in hard when it's blowing, sailing Uni or with crew not used to sheeting the main. I usually clete it between puffs to get some blood flow back into my hand!

At the Tradewinds regatta in big wind, Andi was steering while I was trimming with both hands, and still I had to wrap it to get a good enough grip, and I wear rubber gloves for a better grip than wet leather goves gives me.

On my beach beater Prindle, I use a much fatter, softer fuzzy mainsheet and it is much easier to grip as it is fatter, and softer, but the new mainsheets are so small diameter and have a slick cover, I think you really need to wrap them around your hand for a good grip when they are wet.