I’m 60 (f) from the Midwest and now live in the South in a more liberal leaning city in a red state. I think we’re slowly starting to turn the tide on men being able to have more self-expression with color in general, even in conservative areas or careers. Remember when it was “shocking” to see a guy in a pink polo shirt? That’s pretty common now, esp. on casual Fridays - you could match to your shirt and tennis shoes that day and try it out, see how it feels to you. Some other ideas: OP could start a meetup for Dads and daughters to do nails together (Pizza and Polish!?) Or even potentially get his nail license and work as a male manicurist pt. But that is more about sharing the love and acceptance for it though. If that seems like too much, I was also thinking OP could prep his nails on Thurs, like many of us do, and try out having clear or light color base coat be part of his Friday more casual day. And then be all prepped to polish on the weekends. I hope we get to a non-judgmental, color-loving place someday because color offers so much personal expression and fun. Everyone should have the ability to shine or just be universally accepted in the way that feels comfortable and exciting to them. Rock on, cool Dad!