Depends on the person. When did you decide you wanted to fuck someone?

Sometimes on a date I realize I'm really attracted to someone as the night goes on, and decide that if it starts to lean that way that I'll lean into it, so to speak. Sometimes I had a great first date and know from the start that if goes well then I'll have sex with them. Sometimes I'm purposefully biding my time to make sure I want to, since I've had experiences of having great sexual connections vs relationship connection and want to make sure the latter is strong.

I've often had sex on the first date/hookups, but the decision can happen anytime. Also like anyone, it can depend on how horny or lonely I am, or most importantly, how safe I feel with the person.