Parrott and Viagra

Jock returns home from work all excited as he has managed to get a date with a girl at work. After having his shower he reaches into the bathroom cabinet to get his last Viagra only to discover it had gone.
Confused he wandered through to his living room and there stood his pet parrott with the viagra pack at his feet and an enormous erection.
"Noooooooooooo!" Cried Jock and furious at his pet grabbed the parrott and put him in the freezer shouting "Im disgusted! You can stay in here till you cool down!"

After a few hours Jock, feeling a bit guilty, opens the freezer to retrieve the parrott only to find it on the middle shelf sweating prefusely and still with a huge erection. "How is this possible, how can you still be sweating?"

The parrott, frustrated, replies "You would be sweating too, do you know how difficult it is to prize open the legs of a frozen chicken!!"