The meaning behind someone's body language can vary depending on the context, culture, and the individual themselves.
Crossing legs and shaking a foot could be a sign of nervousness, restlessness, or discomfort, rather than a direct indicator of being sexually aroused ("wet"). It's essential not to jump to conclusions or make assumptions based solely on body language.
If you are trying to understand someone's feelings or intentions, it is always best to communicate openly and directly with them to avoid misunderstanding or misinterpreting their behavior. Additionally, remember to respect personal boundaries and privacy.