Pansexuality (often shortened to pan) is the attraction to people regardless to gender. Pansexual people may be described as being 'gender blind' showing that gender is not a factor in their attraction to a person.
Pansexuality is often compared to bisexuality or omnisexuality, however while those sexualities may be attracted to all genders they may feel a different attraction depending on the gender. For example, a bisexual person's attraction to men might feel different to their attraction to women. Omnisexuality refers to attraction to all genders, with gender as a factor in attraction. Pansexuality, on the other hand, does not care about gender what so ever (although, some individuals who are pansexual may still have a preference).
The second flag shown is an updated version of the pansexuality flag.
Flag and Other Symbols
The pansexual flag consists of three stripes, pink, representing attraction to women, yellow representing attraction to non-binary people, and blue, representing attraction to men.
Another common symbol for pansexuality is the P with an arrow and crossed tail. The cross of the tail represents the cross on the symbol for Venus (♀), used to represent women. The arrow represents the arrow on the symbol for Mars (♂), used to represent men. The symbol predates the flag and is still occasionally used today.
Etymology
The prefix pan- comes from the Greek word for 'all' or 'every'.