I had disolvable ones that stayed in which was good ,with funny loops outside of the stitches, both left and right ends of thread were tied in the middle !!! It was horrible when taped down as kept pulling. Apparently it's my surgeons trademark thing! and in the end I cut the ends off to free myself , they were not going to untie or fall off!!
Re the shaving, mines right on the hair line, so I only get a couple of odd random hairs above the scar, means you can see the scar, but that's ok, I would leave it a while till your bits feel great again!
May just be me, but where they shave you top half of your hairy bits, mine has never grown back the same, I like to keep it tidy, but it always looks like I have cut a step into the top half, like in a haircut!!!