I had the same experiences with Cialis.
The 1st time I noticed close to zero, except good bloodflow and a good flaccid hang. I only tried 4 tabs and the effect did seem to increase (but I was also getting more rest during the same period, so it is hard to pinpoint).
LongVehicle later told me that Cialis does not work instantly and needs time to build up in the body with daily use. At least for guys who have ED. This might explain why healthy guys experience raging boners?
Viagra seems to be more potent, but alas lasts shorter.
Let us know what happens, buddy.
I suffer the same symptoms and am not much older than you, but I pretty much have an idea what it is that is causing it.