YES, yes it's a sperm. I posted the whole story & link on the wall below 2014-02-27 02:07:52 in reply to the same question by @Lawrence2, to wit...
"It's a baby sperm," says Mandy, unzipping a motorcycle boot and slipping off her sock to expose a small black tattoo near the arch of her right foot. It sure is, though honestly, it could also pass for a kid's balloon. She lets loose a laugh as she recalls the day, two years ago, when she trekked to an Omaha tattoo parlor with her five band members during her last tour. "We were goofing off, writing a song about babies or something," she says. "Somehow that evolved into everybody getting inked."