Sexual position similar to missionary, but the guy uses the headboard to hold his weight up, which makes it look a lot like he's doing the butterfly stroke in bed. Popularized by leaked footage of the movie Breaking Dawn. Almost guaranteed to make a girl faint if she likes sparkling vampires.
I didn't think my boyfriend knew anything about the Twilight Saga, but then he tried the butterfly stroke on me in bed. He can't deny it anymore.
by Adorably Perky April 13, 2011