I know the pain you describe all too well...
Getting hard is difficult with this condition and even if I can get it up for the sex, I am a one trick pony. Going a second time is impossible without waiting upwards of an hour and a half, whereas most people my age should be able to go 2-3 times before they cannot go anymore. It is beyond embarrassing and requires extra stimulation
I had looked into penis enhancers to be able to at least please my wife, but given she is one of many who does not "feel" good with penetration, and requires external play to climax, I did not pursue it further. She wanted more connectivity between us anyway and not resort to toys which would cheapen sex.
However, that might be a thought for you if viagra is not working, even after an hour.
Thankfully sex is not the only facet of love that matters (despite what some would say)
We are all pulling for you and I pray you are able to both get answers and work out something in the bedroom to fix your sexlife.