I discovered this piece from the Huffington Post thanks to email by Sheela Lambert:
Today, September 23, is Bisexual Visibility Day! As a sexual identity that is often overlooked or "erased" from media representations of the LGBT community (and which can be invisible even in the queer community), taking one day every year to bring awareness to this marginalized group of people is crucial (and, really, we should be doing this every day).
In honor of Bi Visbility Day we took to Tumblr and did a round up of some of the great art celebrating this excellent holiday:
Two cartoons from there that caught my eye:
(click for the original large versions on Tumblr)
(Happy Bisexual Visibility Day!, by whynotboth)
(No one defines you but you, by Artsy Artichoke)
(See more: "Great Art from Tumblr Celebrates Bisexual Visibility Day")