Similar to when my 2 year old daughter sees a "big truck" but only says "big" plus the "ch" sound at the beginning of truck = "b**ch".  I can't help but laugh, so she keeps doing it!

My daughter has problems with fork, too. Her babysitter couldn't figure out what "fok" meant.

My guy gets very excited when he sees a fire truck... unfortunately, he says (Fire-ire)+(Truck-tr)=

Well, you get the picture. But it's too funny!

I wouldn't let my oldest kid say "fork" in public for years.

My friend Danny tells the story of his toddler Nate, who had been watching Daffy Duck cartoons into the den, being asked to come out and say "goodnight" to the extended family gathering in the living room, before being put to bed. The creative boy, finding himself at the center of attention, gave a big Daffy wave and sang out, "So long, suckers!" only the second "s" came out sounding like an "f". The aunties were shocked, needless to say...

I used to nanny for a little boy named Willie who said stick (stick sub d for st).  He would run around asking where his d*ck was.