I swear I lost two inches, only one of which has come back. My doc never mentioned this either. I too sometimes get a semi-erection sitting on the toilet. And I can whip it up by hand to a semi-erection but cannot acheive penetration. Levitra, Viagra, help a little, but give my a big headache as I have naturally low blood pressure. Our marital sex life is over - my wife is old enough not to care, but I care a lot.