It is a boy. The first pic I do see where the cord is and I can tell that it was between baby's legs but that does look like a penis as well, not just part of the cord. The 2nd image is taken on a higher up plane so we're only seeing the end of the penis, not penis and scrotum. The last pic with the lines looks like scrotum to me. Depending on the way the ultrasound wand is angled it can image as 3 lines. Finally with your most recent scan and not seeing girl or boy parts that is easy to do with a tilt of the wand--you can virtually make it appear as if there are no gender bits at all. I hope that answers your questions.