A penis that can satisfy any woman regardless of her sexual orientation.
I made a lesbian go straight with my magic penis.
I heard this guy can make any woman cum. He must have a magic penis.
by Ghostenks January 10, 2015
Get the magic penis mug.
Male genitalia that can stay erect even after coming to an orgasm

Rarer than a unicorn

Doesn't need time to recover between climaxes
"don't you need a break to recharge before we go at it again?"
"No need baby, I have a magic penis"

Paul is the only guy I have met who can fuck for hours continuously no matter how many times he cums. I love his magic penis

I wish every man was blessed with a magic penis
by AmandaPanda420 May 17, 2021
Get the Magic Penis mug.
The theory that any bisexual person just hasn't had the right cock yet. Bisexual woman? She must just be curious but actually straight. Bisexual man? He must just be closeted.
"Amanda and Liz seem so perfect for each other! Any idea why they aren't together?"
"Amanda says she doesn't date straight girls."
"But isn't Liz bi?"
"Yeah, but Amanda still subscribes to the magic penis theory."
by briaguya April 20, 2015
Get the magic penis theory mug.
1.)one penis simultaneously gets off 2 women.
2.) A menage trois.

3.)Having sex with someone then forgeting if you actually had sex.
1.) The magic penis theory. "I shot her in the grassy knoll then I ran away and no one ever found me"
by Michael Doyle June 5, 2003
Get the magic penis theory mug.