Wondering how other people cope with these coming together in bed?

I have noticed that my sexual performance has changed. Sometimes it is harder for me to get and sustain an erection, orgasm is very difficult to reach. I still enjoy sex and my partner and I are able to talk about it, but it still leaves me worried that I am not living up to expectations, all evidence to the contrary not withstanding.

I am definitely not twenty anymore. Thankfully intimacy not orgasm has become the goal.