That's usually the age most die of unnatural causes. Taking chances because of testosterone, lack of prefrontal cortex development , or just thinking of yourself as invincible. For Gay men it's usually std's, gym stupidity (steroids and/or just hurting yourself constantly), and drugs.
It's the same reason we send them off to war because you'll never convince say a 40 something to put themselves in harms way like that. All my health issues today were all due to the stupid risky shit I did in my younger years that's finally caught up to me. ?