According to wikimedia, the hand-print was a symbol in the early days of the gay community.
See also:
https://www.cafepress.com/homosexual1
www.cafepress.com/homosexual2
www.cafepress.com/homosexual3
www.cafepress.com/homosexual4
www.cafepress.com/homosexual5
www.cafepress.com/homosexual7
www.cafepress.com/feminist1
www.cafepress.com/feminist2
www.cafepress.com/ifeminist