Girls that are natural born teasers know that there are certain things that just drive a man crazy. In this episode of “How To Cause a Boner”, sexy Hailey from Hailey’s Hideaway shows that she knows the power of the underboob. Underboobs is when a girl is wearing a cropped top or pulls up her t-shirt to reveal only the lower part of her boobs. Sometimes it is accidental, sometimes it is intentional, and it is always sexy. Think of it as cleavage for short people. Hailey has really nice big natural boobs, so in her case, there is a whole lot of underboob action going on. Damn hot teaser! I am sure she uses this when she does her hot webcam shows too, she loves to drive you wild!