My 4-year-old boy

I have a 6-year-old daughter and a 4-year-old son.
Last night my daughter said,
"MOMO-chan(one of her friend in the kindergarten) said she wanted
be a boy."
I asked why.
"she said she wanted to propose to get married."my daugher replied.
"But women can propose,too."
"Really!?"

Then my 4-year-old son quietly listening our conversation shouted out suddenly.
"What kind of pose is the propose!?"
He must have been thinking that It was a kind of pose for superhero's
transforming or something.
"Tell me what pose the propose is,please!!"He kept shouting and
stomping.
What makes him believe "propose"must be such a super-duper pose?

So I had to take long time to explain that "propose" was not a kind of superhero's pose and what "propose" was,
and what getting married was.
It is hard to convince 4-year-old boy.