Since there was no explanation given for why cats became pregnant, I concluded that it was just something that happened - no real cause.
A childhood belief about cats and dogs

others believed things like this
- I used to believe that the cats eyes in the road...reflectors...were the eyeballs from real cats.— Liza P.
- I used to believe that what happened in science fiction/horror is movies was realAnon
- I alwaysused to think white cats were girls, and black cats were male ...— Smiley Face
- My sister and I thought cats and dogs were the same animal, the dogs were male and the cats were female.— Paul
- I used to believe all dogs were male and all cats were female. I still call dogs "boy" and cats "girl." — Kelly F.
- Through second grade I always concluded the pledge with '...indivisible, with liberty and just a straw.'— George