I Understand About The Need For This, I Am A

I understand about the need for this, I am a wife and my husband is 61. he visits sites for porn. he says his problem to pentetrate is due to his cholesttral which his good side, is good, and his smoking probably doesn't help. he is doing nothing about this. doesn't ask his doctor for help. my question is would be because of to much porn or is It a total medical problem? and how can this be fixed