Not sure I agree with it, but Music Times made a list in 2014 with the "10 Dirtiest Lyrics":
The Dirt: "I knew a girl named Nikki, I guess U could say she was a sex fiend/I met her in a hotel lobby, masturbating with a magazine"
The opening lines to "Darling Nikki" are so shockingly blunt that it's almost comical, especially since no other song from Purple Rain comes close to being this dirty. In fact, this song is so filthy that it landed on Tipper Gore's "Filthy Fifteen" list of songs, which eventually led to those Parental Advisory stickers on albums.
2. "Sexuality" (1981)
The Dirt: "U don't need no money, U don't need no clothes/The second coming, anything goes"
If there's one thing that Christians love, it's a sexual pun based on something from the Bible. That'll definitely go over well.
3. "Do Me, Baby" (1981)
The Dirt: "Take me baby, kiss me all over/Play with my love/Bring out what's been in me 4 far 2 long"
You don't have to explain how intercourse works, Prince. We get it. Hopefully she gets it, too.
4. "Jack U Off" (1981)
The Dirt: "If you're tired of the masturbator/Come on over 2 my neighborhood/We can jump in the sack and I'll jack U off"
Just look at that title. If Tipper Gore thought that "Darling Nikki" was filthy enough to warrant a Senate hearing, she probably would have sent the military to invade Minneapolis and detain Prince if she ever heard "Jack U Off".
5. "Little Red Corvette" (1982)
The Dirt: "U had a pocket full of horses/Trojan and some of them used...I'm gonna try 2 tame your little red love machine"
Prince, why would you hang with anybody who carries around used condoms in their pocket? That seems too gross even for you. Make sure she gives you one of the wrapped ones.
6. "Delirious" (1982)
The Dirt: "My temperature's runnin' hot/Baby U got 2 stop/'Cuz if U don't I'm gonna explode/And girl, I got a lot"
I'm sure whoever it is Prince is singing to in this song appreciates the warning.
7. "Let's Pretend We're Married" (1982)
The Dirt: "Look here, Marsha, I'm not saying this just 2 be nasty/I sincerely wanna f**k the taste out of your mouth"
...This is absolutely terrifying. Ladies, if any man says this to you, even if it's Prince, you should probably call the police.
8. "International Lover" (1982)
The Dirt: "If 4 any reason there is a loss in cabin pressure/I will automatically drop down 2 apply more/2 activate the flow of excitement"
Prince wrote an extended air-travel related innuendo without a single reference to the mile-high club. This is why he's a national treasure.
9. "Head" (1980)
The Dirt: "I'll give U head/Til you're burning up/Head/Til U get enough/Head/Til your love is red/Head love til you're dead"
Prince, I'm pretty sure she's going to tell you to stop at some point before she dies, so don't go setting aside the rest of your life to do this.
10. "Lovesexy" (1988)
The Dirt: "Oh pretty little whip/U got me drippin'/Drippin' all over the floor, the floor"
I know he's probably talking about sweat, but he could so easily be talking about something else here.