Dr Lillian Glass, author of I Know What You're Thinking (Wiley) and Susan Hayden share five moves that signal he's hooked.
The Head Tilt: Men only angle their faces when listening intently.
The Chest Puff: He's trying to look bigger and stronger than other guys.
The Mini Touch: He'll instinctively graze your forearm while talking.
The Eye Contact: He'll keep looking you in the eye while you're in conversation.
The Smile: His immediate response (before he tries to look cool again) is for his face to light up when he sees you.