It depends if they are sitting on the heat or not and it also depends on the temperature of your hands.

The temperature of your extremities vary up to like 20* or something crazy like that. If you have been outside or using the computer a lot, your hands might be very cold. When you wake up, your hands are generally close to your core temp.

If you have a temp gun, shoot the temp of the snake and the temp of your hand. Then you can see the difference