When should I have sex with him?

I've been friends with this guy for a few years now. We recently developed feelings and became a couple. Our first date as a couple is next Saturday.

I'm really ready to have sex with him as I feel I know him well enough but I'm going to wait at least a couple of dates. He hasn't mentioned it yet. Question is, for someone you already know, how many dates should you wait?

When should I have sex with him?
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