You are NT thick.
When I had my RRP in May 2013 I was referred post op by the surgeon to go to my GP to have the meds, saving the budget of the Royal Berkshire at Reading, LOL.
The meds prescribed were 5mg Cialis/Tadalafil, daily, to improve general circulation around the body and the op site to aid recovery.
50mg Sildenafil/Viagra if and when I would like an erection to have sex. All good so far in theory.
When I spoke to my GP about the meds he confirmed that Cialis is for general circulation recovery. It works, my finger nails are the envy of most women!
Apparently Viagra was discovered as an erectile assistant purely by a accident. It was researched and tested as a medicine for heart problems and to assist general circulation problems, if my memory serves me right, in South America?
As the research continued with assessments of the results on the men, it was cited thstb their partners noted that the men had developed an increased sexual appetite. LOL, all these elderly men with circulatory problems were suddenly fine and demanding sex from their wives. No complaints for the women or their wives.
My opinion is not "hearsay", it is what I have experienced and am experiencing and living with. Now, my surgeon and my first GP go along with this theory and treatment regime. My last 2 GPs all have expressed surprise at my treatment regime, but nonetheless they are agreeable in support of this continuing. I am so grateful.
The daily CIALIS works for me, has done for 19 months.
The VIAGRA has had mixed effects, but when it works it seems to work with spectral results. But, then again I get spectacular results more frequently now without meds. Deep joy.
I do hope that this helps you both.