Allan smiled.  "Well, it's simple.  With no brothers, it means you get all the feminine genes."<br/><br/>While he'd grown up in a mixed family, back on Arcadia, he'd had friends whose families had only one daughter.  That daughter, usually, grew up to be something of a tomboy, priding themselves on being "one of the guys," able to keep up with their brothers.  But, it was those girls who also felt their femininity the most acutely, and generally liked boys who saw past their tomboyish exterior, and treated them like a girl.<br/><br/>And, he guessed, Marty was like that too - she used Marty, a generally boyish name, instead of her given name, a feminine one; she was an engineer, and liked working with machines, whereas most girls would stay away from such heavy work; she had short hair, whereas most girls he knew had long hair; and she was seemingly more comfortable in "manly" clothing, an observation he'd deduced from seeing her discomfort in the dress uniform's miniskirt, and her more relaxed posture in her overalls.  But, despite her boyish mannerisms, she had most definitely feminine traits.  She had a round, heart-shaped face; a nice, curvy figure which wasn't completely concealed by her overalls; and a warm, breathtaking smile.<br/><br/>With this line, he wasn't trying to pick her up, or whatnot, just compliment her, make her feel like a girl.