Was Popeye an Adoptive Father?

I loved the cartoon Popeye! I loved it that once the bumbling Popeye ate his spinach, he could conquer almost any and everything. His relationship with girlfriend Olive Oyl was so sweet and he was so protective of her against his arch rival Bluto. I can remember almost to the day when baby Swee'Pea came onto the scene.

Now, I have the following questions: Did Olive Oyl get pregnant by Bluto and Popeye protected her and her reputation by raising Swee'Pea as his own son? Did Olive Oyl get pregnant by Popeye? Was Swee'Pea actually Olive Oyl's son or was he adopted even by her? I wonder if the creator of Popeye, Elzie Crisler (E.C.) Segar understood the relevence of his message back in 1919.

Once Swee'Pea grew up, I'm sure he had lots of questions about his biology. I can hear it now as Popeye explained to him "You yam what you yam."

So the message today is, simply put, I yam what I yam! Have a great day!!