How old do you think is old?

I think mental age plays a bigger part in our lives than physical age, that may just be my opinion. my mom is 45 and she acts like a 25 year old. she likes to go to parties and be irresponsible. (she's also emotionally unavailable.) But if we're talking about our bodies I think old is 50 - 58. I know plenty 40 year olds who are still in their prime......   reply