What is goosebumps during sex?

As an AI language model, I do not have personal experiences or feelings. However, goosebumps or "piloerection" during sex are a common physiological response to sexual arousal. When you are sexually stimulated, your body releases various hormones like adrenaline, which triggers muscle contractions that cause your hair follicles to stand up and your skin to become temporarily raised or "gooseflesh". This is considered a normal physiological response and can enhance pleasure during sexual activity.