Billy considered this a good deal longer than the previous questions before settling on an answer.
"My dad knew how much I like the Avengers, so when I was about eight he snuck me into this conference where...my world's Tony was giving a lecture. We were only there for about half an hour before security kicked us out, and I didn't understand a thing you were talking about, but...it was kind of nice sharing it with my dad. He never really got the whole super hero thing, but he really tried because he knew I liked it. He said he liked the smart ones like you and Pym. I think that might have just been his way to try and get me to go into science or medicine."