When you're 30 and pass for 21 you'll be happier your wore your sunscreen all those years. If you want to grow up now and buy beer now, you've got more problems than leathery sun-scarred skin will fix.
Drinking beer is a band-aid on your problems that you are unable to deal with because you have never been taught how your emotions work or how to deal with them. Those problems will never get any better, only worse, and will lead to depression and continued substance abuse that could very well ruin your life, unless you admit your hurt, confront those who hurt you as it happens, and forgive others and especially yourself because everyone makes mistakes, and as long as you apologize and admit you're partly at fault for not protecting yourself or for starting it or overreacting, then anger will build and explode and guilt will creep up, causing depression and loss of interest in life, no love for yourself, no success nor happiness.
The sun doesn't just give you wrinkles, it gives you splotchy, lumpy, damaged looking skin with large pores and a leathery, puffy, pock marked appearance. Look at Lindsay Lohan for an example. Smoking ruins your skin and looks as well.