I definitely agree with the bolded part, even if you see her as "relationship material", playing it slow is literally shooting yourself in the foot.
Okay, what if you have a great date, it goes well, you kiss her, etc, bring her home. Then she's on your couch, you make out, her tits are out, she's all horned up etc, but then purposely stop from before you have sex? Maybe throw their own psychology (I don't **** on first dates) back at them, too.
These are just hypotheticals. Genuinely curious of any guys have tried this.