rowlocks
I can’t help but snicker if I hear the construction “do do”, as in “Well, if we DO do it this way then we’ll have these results.” You said doo doo!
Jack Kauffman
heh
I always hear the third one as “Lunt.”
Thespian.
Ball joint.
“Niggardly” has caused a lot of trouble.
I recall a guy once using the word “pedagogy” in a business email, which resulted in his boss becoming extremely agitated and firing him before the underling could manage to explain that “pedagogy” had absolutely nothng to do with child molestation.
And the second one as “Melvina.”
Shuttlecock
Shih tzu
But
Homo Erectus
Titmouse.
Duty
Men : Cockpit :: Women : Box Office
Aspergers
Flocculate. (It’s something to do with water treatment.)
I haven’t, and I’m proud to say that I was immature about it way before South Park got around to it 
Years ago while I was visiting my old home town, I stopped in the local hardware store to see when my buddy who worked there was getting off that day. I found him in the back doing some stocking. He was very enthusiastic to show me something he had put on the shelves earlier that day. He took me into the tools section to proudly show off the store’s supply of bastard files. The owner heard us laughing and exclaimed, " They’re called bastard files and there is nothing funny about it!" Which of course led to more giggling.
Petcock.
Rectory.
Pantene.
I can always make my friend snicker like a 12-year-old by saying the last name of a co-worker we’d never met: Titcomb.
And heh - you said doody.
“Moist” seems to do it for some people.