Yes, your body can act like a capacitor. Have you ever rugged your feet on a carpet and zapped someone with your finger or got a shock touching the kitchen sink?
Although electricity can effect different people in different ways ,getting electrocuted should not be taken lightly.It can cause internal burning ,which can lead to permanent damage to muscle, bone ,organ ,vascular and nervous tissues. Best to see your doctor if you received a serious shock that leads to any discomfort ,pain or redness.
If someone zaps you with static electricity from their finger.Zap them back.