Guys!!!! This women wants some advice!!!! ; )?

I really need a guys opinion. How do you keep guys wanting more of you, the SAME way that guys keep girls wanting more of them? Let me elaborate: A guy will ask for a girls phone number, call her once, they may meet, they may not, but they at least talk once. Then, he doesn't call again and the girl is left TOTALLY confused. He obviously was interested, he may have even said he was, but he doesn't contact her again. Or a guy will email a girl, they'll email back and fourth for a couple weeks, then, it just stops. A month or 2 will go by, and up pops an email or a text message from Mr. Disappear-Reappear!! Usually, this re-appearing act completely excites the girl, because, well, he contacted her again. The thing is, even though this guy didn't contact her for a while, he was still VERY much on the girls mind so she is happy to hear from him. How do guys do it? Lately, a recent happening kind of inspired ME, a female (which I'm sure you already knew ; P )