Feeling a bit annoyed

Yesterday while I was hanging out with my dad he asked me how I know I like women if I've never been with a man, and asked if I ever want to have a baby. I was so blindsided by the question and the random timing of it I didn't know how to respond. Posted a bit of a vent about it on Reddit and a few people said I should've turned the question around on him like "how do you know you don't like men if you've never been with one?" and honestly I wish I did ask him that lol. I hate that we live in such a heteronormative society that some straight people feel like they're owed an explanation by people in the LGBTQ+ community about their sexuality. No one questions straight people about their sexuality so why is it okay to question us about ours? It's okay to be curious and ask how certain sexualities work if you're confused, but I just feel his question was rude af. Can't vent to my mom about this because she thinks I'm bi and doesn't understand that sexuality is a spectrum, my stepdad is too homophobic to vent to about this stuff, and the only person I feel comfortable venting about my sexuality to - my older brother - is busy with work. Anyway, just wanted to get this off my chest and wanted to know if anyone else in the community felt any annoyance with certain straight people like my dad.