If I feel like I’m not ready to take a relationship a step further, but my (future) girlfriend is, I’ll let her know that I’m not ready, and I’d hope she would respect my decision.
If she can’t, then I still would be saving myself.
No, not like that.
What I meant was, for minimal chances of contracting STD’s, the woman shouldn’t have an, ahem, “colourful” history, either.