There are many things wrong with this

From OG: "BBC One will air John Barrowman: The Making of Me, the first part of a series in which celebrities investigate the causes behind their "defining trait". In subsequent installments, violinist Vanessa-Mae will investigate the roots of her musical talent, and sprinter Colin Jackson will investigate what makes him fast; in tonight's segment, Barrowman will investigate what makes him gay."

Is that really his most defining trait?