"pan" means "all" so it's the thought that all forms of sexual activity are equally good and fulfilling. Many consider it weird or even creepy. Includes masturbation, necrophilia, beastiality, adultery, fetishism, and many other things.
"That guy follows pansexuality, it creeps me out."
"Why? It's completely normal."
Someone who is pansexual is likely to have been through a lot and cant be very frustrated when they have to come out someone. Pansexuals are always nice and outgoing though they can be very quiet until they gain their confidence. All they want is love and affection. They are always a big fan of hugs even if they pretend they aren't. Honestly, they are the best, reliable, person you will ever meet.