I am over 70. I only plan to cum every 7-10 days. During the rest of the week I don't jerk off.
Starting about 3-4 days before the date, I drink about 8-16 ounces of pineapple juice each day. It does work for me. For you, who knows?
One day before my date, I take half of my antidepressant dosage. On the day of the date I skip the antidepressant. (After the date I will take that days' dosage. BW, I discussed this with my psychiatrist and given my strong desire/need to cum they are OK with it.)
One hour before the date on a empty stomach I take generic sildenafil manufactured in California. (No foreign V for me.) I also hydrate, and have two water bottles with me for when the date happens.
During the session I tend to focus on mutual pleasure, especially DATY. Then it is my turn, and if I am relaxed and in a good space I have had multiple pops. Usually one, though.
Then a few days later I start this all over again.
I am also trying some of the herbs mentioned in other posts.