There are people who have sex on a first date and there are people who do not even hold hands on a first date.
1. I don't recommend having sex on a first date (or second or third date) unless you are just looking for sex.
2. If this is a blind date, you should not feel obligated to even hold his hand.
3. If you already know this guy and you feel some attraction to him, a normal degree of affection on a first date would be something between holding hands at some point during the date and having one good night kiss at the end of the date. The kiss could be a kiss on the cheek or on the lips but very rarely would I anticipate a slobbery kiss on a first date. That is what I would expect from a girl who deserves my respect.
NO SEX. NO TOUCHING INAPPROPRIATELY. First Date = Hug Goodbye Second Date = Kiss if he encourages it Third Date = Sex if you are up to it, otherwise remain at the kissing phase until you feel prepared. If he at all rushes you, then either create distance or leave him.