I don’t see how having two dads has anything to do with this. Also it would be irresponsible parenting to let a toddler dye their hair.
Well, I’d say it’s safe to bet that two fathers are probably more open-minded in regards to dying your hair and all kinds of stuff compared to more conservative people. Really? Would hair dye harm them? I mean, take your toddler somewhere to have their hair dyed like they want it, not to let them loose with a bottle of hair dye.