Confucius Says: Man with hand in pocket look cocky, feel nuts
Could be that you have poor circulation. Some suggestions:
1) Look up online which herbs are good for improving circulation. Go to your local health food store and buy some (and peppermint for taste) and drink the tea several times a week or before your sessions.
2) There is a Qi-Gong exercise called "shaking the tree". Basically you shake your hands, swing your arms, and bounce around. This is also good for circulation and loosens you up quite a bit. You will know the exercise is working just after you stop and you can literally feel your blood stirring.
3) Eat raw veggies that improve circulation
This may help. Not sure if you sponge or what but lobster claws feel kinda awkward. I roll with 3 mil all winter.