have google's answer
Pansexuality is sexual, romantic, or emotional attraction towards people regardless of their sex or gender identity. Pansexual people may refer to themselves as gender-blind, asserting that gender and sex are not determining factors in their romantic or sexual attraction to others.
basically they're gender-blind people who will date anyone, even things like animals and paper(dont attack me, i was told by my dad that they'll legit f**k or date anyone no matter what and i believe him because he's been all around the world and he is pretty damn smart)