Prostate

The old perfesser walks into his doctor's office and sits down in the waiting room. While he is waiting his turn to be seen, a casual acquaintance walks in and sits down next to him.

The newcomer asks, "W-w-what are yyy-you dd-d-doing here?"

The old perfesser replies, "I'm waiting to see the doctor."

"W-w-why dd-do yy-y-you wwant to s-ss-see h-him?"

The old perfesser replies, "Well, if you must know, I have a prostate problem."

"A p-p-prostate p-p-p-problem, w-what's th-th-that?"

"Well, if you must know, I pee like you talk."