As others have said, this is absolutely an individual decision and you shouldn't base your activities on somebody else's numerical guidelines. I would add two things:
1) By sex, do you mean PIV intercourse? Because there're all kinds of levels of sex, much more than the old baseball analogy. You can work your way up the scale as trust is gained.
2) Some people, mostly women but I guess sometimes men, play mind games by teasing, leading on, flirting outrageously and suggestively, but ultimately denying sex. I don't know who taught women that they should do this but unless you are Angelina-Joliesque or similar you are better served being honest about your arousal level and what steps you are ready to take to deal with it. Playing hard-to-get can be fun in junior high, but it gets old fast and can be a quick deal-killer of a new relationship if that's the perception of what's going on. You can, and should, save flirty hard-to-get games for later, when the relationship is established and the playfulness level is well-understood. (Understand, Honey123, I'm not aiming this advice specifically at you, but to anybody who uses this m.o. at the beginning of a relationship to somehow "gauge" the prospective partner.) There certainly is a time for cat-and-mouse, but not at the beginning of a relationship.
Cheers,
Kev