Lol perception is a helluva thing. I remember one time I asked this guy for his fb contact, as I do with both males and females who I think are worth keeping in contact with, the next thing I know he offers me the "D," prompting a "wtf dude?" comment from me. He automatically assumed that I wanted him.
But to answer your question, I don't know if we have so much more body language signals than you do. In fact, when males and females find someone attractive both genders can't help but look. A female might be more subtle about it and sneak in a few glances here and there. A male may either be subtle or not...like in Kyle's case where he outright stared at the object of his affection.