“‘Not that one with the droopy head,’ Lo said, pointing to a sperm that looked like a deflated balloon sagging over its string. He rejected a sperm with a thickened midpiece that he described as a ‘turtleneck,’ and said he also avoids sperm with curlicue tails or an extra tail. Slow pokes and non-swimmers are spurned as well.” The NYT takes you inside the selection process that’s “like a microscopic Mr. America contest.” Tinder for Sperm: Even in the Petri Dish, Looks and Athleticism Are Prized.