What made you realize you had an attraction to dogs?

[Sumpup]

I tell this story often. Be me back then a horny teenager. Riding around town with friends in a truck as teens do. Drive past a lady with big boobs and shorts walking a giant male black and white great dane. We all stare and almost run off the road. I say " wow that's a big dog" all my friends say "what dog" ? I was rock hard

I was so embarrassed but played it off. There were other times but that was the first public realization.