LOS ANGELES (Reuters) - "Jersey Shore" star Snooki and Charlie Sheen have topped a poll of nightmare celebrity Valentine dates, and few people want to cuddle up with Ashton Kutcher on February 14 -- at least, not on film. According to a Valentine's Day survey by Yahoo's OMG! website, 30 percent of men would rather be single than take Snooki, aka Nicole Polizzi, out on Valentine's Day. And newly-single Kim Kardashian didn't do much better, coming second in the nightmare female celebrity date survey of 2,001 people. ...