Let’s not forget the classic Yank My Doodle, It’s A Dandy.
Brings a tear to my eye, it does…
Deepthroat Island - the title was actually censored on the cable system’s tv guide channel. It read, “D…throat.”
Holy shite, I am rolling. There are some definite classics in here.
Itty Bitty Gang Bang, The Pudsucker Roxy, Yank My Doodle, It’s A Dandy - my stomach hurts.
May as well contribute another one that escaped me yesterday: Do The White Chick
Cockoon
Close Encounters of the Turd Kind
Blackdraft
Howard the Fuck
The Schlong-shank Redemption
Jacob’s Bladder
Let’s not forget:
Deep Impact
Fire Down Below
In & Out
Every Which Way But Loose
Howard’s End
The Black Stallion
Big Daddy
Three Men and a Little Lady
Shaft
Oh, wait those are REAL movie titles!
**American Booty
Dirty Pantsing
“Water” World
Humpy Old Men
Sluts of Beverly Hills
The Little Spermaid**
Blazing Zippers
There’s Something Inside Mary
Nominee for the most tortured attempt:
Lord of the G-Strings: The Femaleship of the String
**Peeing there
Gulp Friction
Vampire in Brook-Lynn
I know Who You Did Last Summer
The Mighty Fucks
Riding in Cars with Boys, and then Giving Them Handjobs While Parked Under the Interstate**
A Midsummer Night’s Cream
No kiddng–it was listed in Shakespeare Quarterly!
Made up?
Lube
Lube 2:Hyperlube
Hmm. I was actually going for titles you have actually seen, either on the shelves, in some rag mag (sorry), or on a preview channel somewhere.
My examples all fit this category. But what the hell, it doesn’t really matter, does it? 
The Cunt for Red Cocktober
So much porn, and no-one has mentioned:
Cliffbanger
Not long after Space Jam came out, I was in a hotel room and noted that the porn playlist included Face Jam.
I once saw an ad for a beach movie (based on the Annette Funicello/Frakie Avalon Movies): Beach Blanket Bango! (complete with hokey songs). Always wondered if it was any good.
I’ve seen When Harry Wet Sally laying around before. Always struck me as amusing.