Hello, I Am A 60 Years Old Male. I Noticed

Hello,
I am a 60 years old male. I noticed a decreasing rigidity during erection. I suppose this is normat to some extend and it comes with the age, but it might be also due to the phimosys that developped durind last year, or due to some other causes? Therefore, I would very much know if I am within normal limits, or I should seek for professional help. Is there any way to evaluate my condition?
Thank you very much for your answer.