The beginning of the song seems like it's about a girl who is really attracted to someone and wants to hook up with them. I think it's her first time being this close to the person and it excites her and makes her wanting more. I say someone because it's not clearly defined if it's a boy or a girl she's with because they sing "I wanna kiss a girl" and "I wanna kiss a boy" so it could be either sex. The song could also be sort of an experimentation because she wants to know what it feels like to kiss either sex. She's curious and wants to see all of her options.
The beginning of the song seems like it's about a girl who is really attracted to someone and wants to hook up with them. I think it's her first time being this close to the person and it excites her and makes her wanting more. I say someone because it's not clearly defined if it's a boy or a girl she's with because they sing "I wanna kiss a girl" and "I wanna kiss a boy" so it could be either sex. The song could also be sort of an experimentation because she wants to know what it feels like to kiss either sex. She's curious and wants to see all of her options.