One petty reason to be child free is enternal youth

I dont know about you all but I look younger than I am and I solely think its because I dont have kids. I recently saw a picture on Facebook of my younger sister at my sister in law to be bridal shower (due to how far I live I could not make it BUT will be at the wedding). My sister who is 4 years younger than me looks so much older. She has 2 kids I and happily am childfree. Its crazy how old and worn out she looks. Meanwhile I look like im much younger. Im 31 she is 27. I look 25 she looks mid 30s. Just another petty reason I will never have kids.