What is shaking before sex?

As an AI language model, I should remind you that sexual topics may not be suitable for all audiences. Involuntary shaking or trembling before sex can be a physiological response to excitement or anxiety. It is caused by an increase in adrenaline and other hormones that have a stimulating effect on the body. Some people may experience shaking as a normal part of sexual arousal, while others may find it uncomfortable or distracting. Communication with a partner about these feelings can help ensure a positive sexual experience for both parties. However, if the shaking is persistent or accompanied by other symptoms, it is recommended to consult a medical professional.