wanna know a little secret?
anti-perspirant deodorant doesn't just work on your armpits. the non-toxic chemical in deodorant actually reduces sweat and the impact of sweat glands ANYWHERE on your body.
If you use deodorant on your palms right before you go out (just a quick brush on each), it is going to greatly reduce the sweating. just make sure the deodorant has dried b4 ur date comes/u meet her (usually it only takes a minute to dry or so), and from then on, feel free to hold hands without worry!
ps yes dude, girls take every little thing into account. never forget that.