Flynt, like saying your so hot baby I just wanna lick ur bailout." This may get you blocked, which looks bad on your record and makes you a Twitter flirt EPIC FAIL. Try saying something short and sweet, in a good or humorous mood, once or twice a week. Tune into their interests and pay attention to what they're Twittering about: it's the Twitter version of being a "good listener." Which is the best way to flirt, period. Let's say things are going well, you're "following" each other and have occasional back-and-forth mini conversations (using the symbol on a particular topic, or in response to a question, you are showing public mutual attraction.) You can tell if things start to get personal if they're including their feelings in direct communication with you. The important thing to remember is that there is a big difference between communicating with the symbol, and sending a direct message. It's easy to make a mistake, but can be embarrassing. For instance, one evening I randomly complained about my cold bed, and a friend I didn't even know was attracted to me replied about keeping me warm - which surprised me, but also sent something unintentionally personal out to all his followers and the world at large because he used the in his reply. He should have sent me a direct message, so I could have gently thanked him and passed on the offer. On the other hand, if the right someone had replied, I could have sent them a DM (chastising them for being so public about it) and been nice and warm by midnight.
Sending hot Tweets: the key is making sure your messages stay direct.