1.   Difficulty with penile blood flow is the most common cause of impotence, Dr. Whitehead said.

2.   Muse is a urethral suppository that increases penile blood flow.

3.   The combinations found to be most effective in increasing penile blood flow were lavender and pumpkin pie, doughnut and black licorice and pumpkin pie and doughnut.

4.   There is even a brief visit to an odor lab gauging the effects of certain smells on penile blood flow.

5.   Viagra, according to him, is revolutionary because it contains a chemical that helps restore penile blood flow and erections in response to sexual stimulation.

6.   The medication alprostadil increases penile blood flow.