A couple guys have said this. Maybe you live places where it's almost never hot? Or maybe you just naturally don't sweat much? I love hitting with no glove, but unless it's cold enough that my hands don't sweat and warm enough that my hands don't go numb, either my hands get very slippery from sweat or they're numb :-P For me that's a VERY small range of temperatures!
I have to wear both gloves to protect my hands. I have a bit of arthritis and can use the gloves. I change grips often - do them myself to save $$$.