First, determine exactly what you understand "risk" and "aggressive" to mean.
The risk associated with stocks is not the risk of losing money, it's the risk of losing money in the event that you sell while the stocks are down. That's a VERY important distinction.
There are three scenarios where you sell while stocks are down
1: while you are still working, but you are shitting yourself in fear and vomiting all over your tie because the markets have dropped so much that you panic sell
2: after you've stopped working and you literally must sell some stocks in order to eat
3: you have convinced yourself that you are smarter than everyone else and believe that you can predict how geo-political events are going to impact the markets, so you try and market time your exit and re-entry into equities
Age is irrelevant, some young people will choose to less "risk" and some older people will choose 100% stocks. It all comes down to your likelihood of selling.
An antsy 31 year old who gets spooked easily by financial news and is convinced that they have unique insights into how politics will influence the market should probably have a lot more of their portfolio in less volatile forms. Meanwhile, a retiree with a rock solid pension or rental income that covers all of their basic needs could easily maintain 100% stocks.
On the flip side, an equally valid argument can be made for the retired guy above that since he has more than enough, then why worry about maximizing returns??
Understanding your own motivations and fears is really the key to setting your AA.