My Daughters Have a Wonderful Father, Something I Never Had

My girls are now 20 and 15, and for every year I’ve been their mother I’ve been envious of them.
Is it because of their youth and the years of possibility they have in front of them?
Obviously.

Is it their thick, luxurious heads of hair?
Since their births are the reason I lost mine, absolutely (and you can throw anger in there, too, now that I think about it).

Could it be because of the vocal talent they both inexplicably got and the thrilling rush they get from performing on stage in front...