Its a bit of an ouchie when you go to check all the silk cocoons you set aside to breed for the next generation and literally all of them except for one are a single sex, seeing as its just coinflip luck
Maybe we could get a hearth magic to help with that? Either allowing pre-determination of sex during cocoon stage or just straight up allowing you to transmute the silkmoth you have from a male to a female or vice versa.
God forbid you just had terrible luck and all your silkmoths for this next generation were the same sex. If you dont have any spares at all you're just boned in that situation.