Bacteria

"Do you know how unsanitary that is, Lieutenant?" Janice asked, wrinkling her nose in disgust as her companion picked up a candy off the floor and popped it into his mouth.

"Not much different than swapping spit when you kiss," the young man replied.

Janice turned slightly green. "I could have done without that comparison."

"Come on, Janice, bacteria is your friend," Kevin piped in an exaggerated Irish accent. "You can't live with it and you can't live without it."

An impatient voice sounded across the intercom. "Yeoman Rand, I'm waiting for those reports." Janice scurried to the turbo lift.