#2 Your date doesn’t know your body yet. It takes time to get to know someone’s body, from their little quirks to their ultra-erogenous zones. It’s highly unlikely that your date will go all Sherlock Holmes on you and deduce where best to touch you.
First dates can be awkward enough as it is. Just imagine how much more awkward it would be to start fumbling in the dark while not knowing how to even please your partner!