How do I convince my girlfriend that doppelgangers do exist?

And that it was in fact my insidious evil double doppelganger that she caught in bed with her sister that somehow got a hold of her house keys?How do I convince my girlfriend that doppelgangers do exist?
I HATE that word.

That is the most annoying, awful word i've ever seen or heard.



It sounds like a genital disease or a kids toy.

I HATE it!How do I convince my girlfriend that doppelgangers do exist?
You should show her your doppelganger and all will be well!

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