Like this???
http://tbn0.google.com/images?q=tbn:41MT9mdvKyW97M:http://rippsblack.tripod.com/images/Art/bisexual.gif This should work
Thank you. 
This page displays a sort of bisexuality flag – red on top, blue on bottom, with a narrow purple band in the middle.
When I first read this, I thought you wrote sexual imaginary tattoo’s. And I was thinking I could get one that says “I’ve had a threesome with Rosario Dawson and Charlize Theron”.