"I saw a couple kissing…and the guy's mouth was entirely covering the girl's mouth…I couldn't tell if he was kissing her or suffocating her," said Jon Tan, 21, from Boston.
Cierra Jones, a 22-year-old college student who works as a waitress in Huntsville, Ala., said, "I hate when people kiss at my tables full-on."
"I've seen a guy with a girl laying on a car in front of a mall, completely making out. It was so gross," said Kaitlyn Baisch, a freshman at Arizona State University.
Baisch prefers something more sublime. Her favorite movie kiss is the spaghetti scene in Disney's classic cartoon film, "Lady and the Tramp."
"It may have looked like an accident with the spaghetti," she said. "But Tramp knew exactly what he was doing."
Online phenomena like Second Life, social networking and dating websites may be doing relationships a disservice, according to author Kirshenbaum.
She fears potential lovers are "acting without the [sensory] signals that have evolved over time. When you can't sense and taste but only see a good match with a photo visual, you are flying blind, could be missing someone who is great."
Geoffrey Michaelson, a Virginia psychologist who is on the faculty of the Human Sexuality Institute in Washington, D.C., said the kiss is essential to relationships -- "the touch of the lips is rare, like a fingerprint."
"In romance, the kiss takes us toward emotional intimacy," he said. "We face our beloved, look into their eyes, or close the eyes as we reach deeper into the soul of the experience, crossing the line between our separate selves and our deepest longings to be part of something more."
ABC On-Campus reporters Candace Smith, Chelsea Smith and Ashley Jennings contributed to this report.