No offense but you should have talked about it. You could have said something like “for now we’re just FWB but we can talk about it when I feel more comfortable talking about it.” I agree he should have asked maybe 2 weeks to a month into the relationship later, however what he asked is a VERY important question and it might be a very sensitive topic to him, so it’d be best to arrange a long talk between you two when the time is right because you both might be very emotionally sensitive and
Emotions WILL run high, so you both need to gentle, kind, and empathetic in your words, when it does come up. I hope this helped and I’m sorry if I sound like captain obvious, but it’s a very emotionally charged and sensitive topic and I’m only basing this off of how I’d feel deeply hurt if someone didn’t take the topic seriously. But I know it might be scary or weird for you too, do I’d recommend kicking the can down the road for another month and schedule a date and time to talk.🙂