With a heavy sigh, Jeff stretched his legs apart and raised his left one, putting it through the first leg hole in the skimpy undergarment. He repeated the process for his other leg, and with a cautious pull he hoisted the barely-there piece of fabric that was somehow a swimsuit and not pure string.
The bikini thong was dreadfully uncomfortable going up Jeff's thighs, as it was cold and still moist, but drying just enough that it was more damp than dripping. It was an unpleasant sensation, until a thought dawned on Jeff. This had been worn by Brianna. It must have been, why else was it wet? Thinking back to it, Jeff recalled that her hair had seemed wet as well, with flecks of water around her neck and face. This realization made the situation significantly more enjoyable for Jeff, who happily slung the swimsuit around his rear. It was tight and very revealing, with his bare buttcheeks feeling unnaturally breezy despite him technically wearing something around them, but he was calmed by two things.
One, he would just run for it. Cover himself with his hands, one for the front, and certainly one for the front. He may be laughed at and it would be embarrassing, but it was better than people seeing his new 'genitalia' in all its soft and round glory. Besides, once he was in the pool, he could swim to the deep end and hide there, where the flickering light and waves on the surface would blur out everything below his waist like a frosted window.
Second, as perverted as he knew it was, the idea of the most intimate and sensitive part of his body (even without his usual gear being attached currently) becoming so closely acquainted with an article of tight, tight, snug clothing that had recently been in contact with the thighs, buttocks, and..... oh, my..... of Brianna Ferguson? And she had so readily given it to him to use? Oh, what an experience.
As Jeff finished up by tucking the breast into the swimsuit's front (which was more a matter of maintaining balance than forcing it into anywhere) with the nipple safely hidden in the barely one-inch wide piece of cloth, he began to pump himself up. Taking a glance out through the pool shed door, Jeff memorized the layout of the land as best he could. One person there, two people there, an opening there..... if he was quick enough, people might not even notice him until he got into the water. As for the bikini top, Jeff held onto it in his right hand, not wanting to just leave it behind in the pool shed. He figured Brianna would want it back since he had no use for it, he didn't want anyone to go looking for it and wind up finding the bucket full of his breast-urine. Taking a deep breath, Jeff covered both sides of his lower body as best as he could, and.....
It went by in a blur. Jeff felt the wind on his face. The sound of people talking and the noises of the party warping around his eardrums from how fast he was moving past them. He thought he heard laughter, but couldn't make it out or tell if it was directed at him. In any case, he drew to the edge of the pool, jumped, and.....