An old man goes to the doctor to ask him an impor...

An old man goes to the doctor to ask him an important question. "Doctor, when I was in my 20`s, it took both of my hands to push down my hard-on. When I was in my 30`s, it took one hand to push down my hard-on. When I was in my 50`s, it took three fingers to push down my hard-on. Now that I`m in my 60`s, it only takes one finger to push down on my hard-on! So what I`m basically trying to ask you is? How strong am I going to get?"