Free Grunt by Mary Roach

use the adjective boyish , but on paper he is very much not a boy. He’s a chief (of the Walter Reed urology department), a director (of reconstructive urology), and a colonel.
    “Also,” says Jezior, “the mouth is tolerant of pee.” He means that the mouth is built for moisture. It’s possible to create a urethra from hairless skin on the underside of the forearm or behind the ear, but the frequent wetting from urine can degrade it. A kind of internal diaper rash may ensue. Inflammation eats away at the tissue, tunneling an alternate path for the waste, called a fistula. Now you are dribbling tinkle from a raw hole in your skin. Just what you need.
    White’s face has been draped with a blue sterile cloth with a single opening, reminiscent of an Afghan burqa. In this case, the opening is positioned over the mouth, not the eyes, as though the patient belonged to some esoteric spin-off sect. Retractors square White’s mouth, pulling it wide to either side, the way kids will do with their fingers to frame a stuck-out tongue. Jezior outlines the graft with a surgical marker and uses an electrocauterizing tool to cut it free. A vaguely familiar aroma, somewhere between brazier and burning hair, hits the air. Jezior is indifferent to it but reveals that the prostate, when cut open, releases a distinctive scent that’s kind of nice.
    Using long-handled forceps, Jezior passes the dangling tissue to Molly. They look like a couple sharing a Chinese entrée. Molly drapes the graft over one gloved thumb and, with her other hand, snips away bits of fat and tissue to make it thinner. It takes time for new blood vessels to grow in and service a graft. For the first couple of days, the cells of the graft are nourished by a broth of serum. If the graft is too thick, only the cells on the surface will thrive, and those on the interior will die. For this reason, larger skin grafts, like the ones on the back of White’s remaining leg, are run through a mesher. The holes of the mesh create more surface area for the business interactions of cellular life: nutrients in, waste out.
    If replacing part of the urethra doesn’t resolve the problem, another option would be perineal urethrostomy. Here the surgeon would excise the damaged portion and thread the shortened urethra through an opening in the perineum—the no-man’s-land between scrotum and rectum. “Then they have to sit to urinate, like ladies do,” says Molly.
    How big of a deal is that? Jezior makes the point that someone whose reproductive organs have been damaged by an IED has typically also lost one or more limbs. Having to sit down to urinate probably doesn’t rank high on the worry list.
    Molly tilts her head to face me. “It’s huge.” Depending, to some extent, on culture. Some years back, she attended a session on perineal urethrostomy at an international urology conference. The Italian surgeons were aghast. “You can’t tell an Italian man he’s going to have to pee sitting down.”
    Molly was one of two female urologists at the meeting. She notices the disparity, but it doesn’t faze her. On the upside, she never waits for a toilet during session breaks. “I’ve been the only one in the women’s room at some of these urology conventions.”
    “Same here,” deadpans Jezior.
    The piece of cheek is ready to begin its new career. A nurse pulls a sterile drape from White’s hips and begins rubbing his skin with the antiseptic wand. Such is the vigor of the youthful male that even under general anesthesia, even when it’s a ChloraPrep sponge bestowing the caress, the penis responds. It is a less robust response than normal, perhaps, because Jezior has prescribed something to temporarily blunt erections. Surgical incisions are sewn up while the organ is flaccid; erections stretch the incision. They hurt . However, erections bring more blood into the penis, which speeds healing, and they also help prevent scarring. The latter is important because