I just found one technique from Taoist yoga. It is anus breathing technique. You may Google it.It appears to be good even for enlarged prostate.Trying different techniques may help you to surmount your problems.Even trying new techniques give you vigor.
You may try male deer exercise and your wife can try female deer exercise as an adjunct therapy. Google these phrases, learn the technique and practice regularly.You may do the practice togetther which will work as a good foreplay as well.
You sound like you are low on testosterone which causes climax and ejaculation issues ..
You can take a monthly treatment that is prescribed by your doctor and it will correct your problem with in a week or so .. I have been taking T for several years and it helped me improve my performance. Btw I am your age range and have been married for many years. And our sex is very good ..
Good luck Ojsam