Hi Mrs MAS, I agree with you. As sad as it is, if your penetrative sex life has ended and there is no realistic likelihood of it returning in the future, I can't see the point of taking yet another medication with its own set of side effects. I guess there may be a time in the future where his PSA stays low for a sustained period and he & the onco agree that he will try a hormone holiday, in which case his libido may return but in that case, he could perhaps have ED meds if needed.
I think that sometimes men who don't have advanced PCa can't imagine that the reality for most couples is that sex and intimacy dies soon after an incurable diagnosis .... either because of meds, grief, depression, anxiety, bone pain, bone / spinal weakness, lymphodema, fatigue, fear, anger, whatever. The total loss of libido means that for some men, it isn't simply that they don't feel randy - the thought of touching someone else's skin makes them shudder, the prospect of inserting a tongue in someone else's mouth or a penis into someone else's body part is actually repulsive. It was well described here by a past member as 'looking at my gorgeous wife's behind and realising it may as well be a lump of concrete'. If that is where Mr MAS is, I can't see any benefit in him taking Cialis.