You strangest childhood memory?

Getting old seems to mean remembering, looking back, and I was thinking of possibly the strangest -- and a bit disturbing because of some questions it raises --childhood memory I have...

I was maybe 5 years old and across the street playing with the girl my age who lived there. We were in her garage where they had some pet guinea pigs, and my dog was with us. My neighbor was petting the dog, a beagle, rubbing him stomach as he rolled on his back, when she asked, "Did you know you can milk a dog?"

I was like, "Huh?"

And she preceded to show me what she meant, grabbing the dog's penis and "milking" him to orgasm. Which totally confused me, but these many decades later makes me wonder just what was going on in her house that she knew how to do that.