Selena Gomez - Slow Down Lyrics Meaning

Def about sex. Could be about losing her virginity (hence ready for inspection, taking applications) or about a girl who already lost her virginity but is still greatly inexperienced. I think it's the latter since she seems to know (no pun intended i swear) the ins and outs of sex. The first time probs went fast and now she's older, old enough to go clubbing with older guys, and wants a longer experience where they can do it over and over again. Her first time was obviously not up to par, with some guy she didn't really like, which is why she's being so picky now. And she wants a more sensual experience, which is why she likens sex to a song.