She has a tongue piercing near the front of her tongue. She may enjoy going down on women as well. When the piercing is in the front, that is what it indicates.
My wife, after the party and the dance where everyone dances with her and puts their hands on her and makes fun of her, she always gets very horny and we end up with some guest in the house while I act drunk while I'm asleep, she goes to the kitchen to prepare some drinks with her friend behind her and then they start fucking. I love watching her while they are fucking her.