Dara Torres is the fastest swimmer in American history — and the oldest swimmer to ever make the U.S. Olympic team at 41 years old — and she’s still on top of the world. “It was kind of hard at first when I would see loose skin on my body. I was like, ‘Oh my gosh.’ I was working out the other day and I was looking in the mirror because I was boxing and there are mirrors everywhere — it just is what it is. That was probably one of the first times where I sat that and looked in the mirror. I’m like, ‘There’s nothing I can do about getting older.’ I have some loose skin but that’s just aging — an…