i had a stint late last year/earlier this year where I had no sensitivity and the sex took forever. the 2 options i could think of that caused it were either I was taking too much anastrozole or was taking too much liquid tadalafil from a research chemical company. I cut my anastrozole dose in half from .25 2x per week to .125 2x per week and use the cialis a lot less often and dont have the issue anymore.