Sore Knees

A woman went to the doctor and complained that she was suffering from knee pains:

- Do you indulge in any activity that puts a lot of pressure on your knees? - asked the doctor.

- Every night, my husband and I have sex on the floor doggy style.

- I see - said the doctor.

- You know, there are plenty of other sexual positions?

- Not if you want to watch TV there ain't!