To refine the thought here: flirting comes naturally in the right situation; you're emotionally open, you like the other person and they like you, you see them every week. and you have the time to escalate very slowly
It doesn't come naturally when you've got one hour to impress them on a first date, or when you meet them at a conference and have two and a half days before they disappear entirely from your life
Hence the need for flirt training and strategies to get over anxiety about flirting. We're trying to do the natural thing in the wrong settings and at 1000x the natural speed
So these lists of tips like “touch his arm, make eye contact, laugh at his jokes”—all of that will come naturally & unconsciously in the right circumstances!