And on a sexual level, “blurred lines” refers to girls being interested in casual and dirty sex but having to maintain the good girl image.
Also, “blurred lines” refers to the moral ambiguity of flirting with a girl Thicke knows isn’t single. Even if she’s in a committed relationship.
Robin Thicke: "Just let me liberate you... I know you want it... I hate these blurred lines."
Gay guy 1: "I don't know if I'm ready for that."
Gay guy 2: "You invite me over, and now you don't want to hook up? Gosh, what's with these blurred lines??"
"Baby, these are blurred lines."
"I'm a good girl!"
"I'm a bad girl!"
"Whatever, these are blurred lines."
"This music video is so sexist."
"It's kinda blurred lines, we're not dating, but we're more than just friends with benefits."