My husband is upset I painted our son’s nails

My son’s (6) favorite color is light blue. Three nights ago, he offhandedly told me, “Too bad color nails are for girls.” I took a brief moment to think and then told him, “Colored nails are for anyone who wants them.” He excitedly told me he wants light blue nails, so I got light blue nail polish with the groceries yesterday, and tonight, we painted them together. We were sitting there in the bathroom together while they dried, him watching something on Netflix and I was reading a book, just keeping him company. My husband was walking by, said hello, and then stopped in his tracks and said, angrily, “What did you do?” Son was oblivious, engrossed in his show. “We painted his nails light blue, his favorite color!” I replied, keeping a smile. He mouthed, “What the fuck?” at me (the “fuck” was audible) and walked away.To be fair, he didn’t know we were going to do this; he works long hour weekends (Saturday-Monday) and wasn’t around for the conversation. I didn’t really anticipate it being a point of contention. I don’t think I’m being unreasonable in painting my son’s nails at his request, and I’d really just like some advice about how to navigate this impending conversation with my husband (sure to happen after the kiddos go to bed) while he is engaging in.... toxic masculinity? Am I overreacting in assuming this is toxic masculinity?tl;dr Painted son’s nails, husband upset about it, need advice on how to approach conversation about it via /r/Parenting https://ift.tt/3sX2v7P