儿子

这几天儿子学会了掀起上衣让姐姐们看他的肚脐，有时走在路上也会突然把衣服一撩，"see！ my bellybutton。"
这天晚上简短地给儿子讲了肚脐的来历，when you were a tiny baby, still in mommy's belly, there used to have a cord, like a long long straw, connected to bellybutton, you would use the cord to get food from mommy。 结果儿子瞪大眼睛叫到，"I was in your belly?   Did you eat me?"