Star Trek: Voyager1995

The Doctor:
You're the Captain. You can't have a relationship with a member of your crew, they're all your subordinates. So where does that leave you? The occasional dalliance with a passing alien? Voyager could be in the Delta Quadrant for a *very* long time. A hologram may be the only logical alternative.

Captain Kathryn Janeway:
He's not real.

The Doctor:
He's as real as I am. Photons and force fields, flesh and blood, it's all the same, as long as your feelings are real. He makes a joke, you laugh. Is that an illusion? He says something that makes you think. Does it matter how his molecules are aligned?