1.   According to a Pfizer spokesman, men who called the number frequently had to be reminded that the drug would not work without sexual stimulation.

2.   Researchers are finding that exercise not only pumps up the heart rate and breathing but also primes women to respond to sexual stimulation.

3.   The drug does not cause erections on its own, and without sexual stimulation, there should be no erection.

4.   The injectible drug, known as Caverject, and the pellet inserted into the tip of the penis, Muse, work even in the absence of sexual stimulation.

5.   The medication works only with sexual stimulation to help achieve and maintain erections.

6.   The sexual stimulation and release obtained through cybersex also contribute importantly to the continued pursuit of the activity, Schwartz said.

7.   They are finding that exercise not only pumps up heart rate and breathing but also primes women to respond to sexual stimulation.

8.   Young men use methamphetamine for sexual stimulation.

9.   Add a little old-fashioned sexual stimulation.

10.   The drug does not directly cause an erection but boosts blood flow during sexual stimulation.