what does it mean if he’s talking about babies with me!

I was recently out on a date with a guy and on our way back home before he dropped me off he asked me if i ever get baby fever? And i said  “sometimes” and then he kept talking about how he would be great dad and talking about what my kids would look like . And he had never talked about kids with me so i was confused. What does it mean? ( also, we had sex that night)