I think that these old images helped me to better understand why I find high-rise swim briefs unflattering, on both men and women: they just draw the eye completely to a giant mass in the middle of a person's body and make that part of the body look larger. They don't make the waist look any smaller. Unlike trousers that sit up at the waist, which lengthen the body by drawing a long line from the waist to the feet, these shorten the torso and the legs because they cut the legs off completely from the torso. These briefs are cutting the body into three disconnected masses. If they had some legs to them, even with just a 3-inch inseam, they would help to connect the legs to the torso and have a more flattering line that connects the body. As awkward as I find a speedo to be, I think they may actually be more flattering to a man than these large briefs are.