The short, not entirely accurate answer: yes.
The long answer: I'll provide you with an anecdote from my childhood and let you figure out whether it sheds some light on the subject.
After I started talking I played a lot of language games, just fooling around with sounds and syllables and such - playing with my new toy, as it were.
One night we were at my grandparents' place, and I was sitting at my mother's feet while she was reading. I started making up words with a consonant-vowel-consonant pattern, starting right at the beginning of the alphabet. Bab, bac (soft 'c'), bad, baf, bag... every time I found a word I knew I giggled and then moved on to the next combination.
My mother paid no attention at all as I worked my way through the b's, c's, and d's. The fa-'s were fine (fab, fac, fad, faf...) as were the fe-'s, fi-'s, and fo-'s.
When I got to the fu-'s it finally dawned on my mom where this game was headed, and she started trying to get me to stop. I didn't stop. Fub, fuc (pronounced fuss), fud, fuf, fug, fuh, fuj (pronounced like fudge)... then I got to fuk, and my mother smacked me. Hard. I had no clue why.
So let me ask you this, swamp: did I swear? Did little me say his first obscenity at the age of three? And was my mother justified in smacking me?