21. With further sexual stimulation , the heart rate increases, blood pressure rises and breathing becomes quicker. 22. Sex toys have been used as a source of sexual stimulation for thousands of years. 23. For other women, further sexual stimulation can be overwhelming or painful due to clitoral hypersensitivity. 24. The drug does not directly cause an erection but boosts blood flow during sexual stimulation . 25. The labia minora become engorged with blood during sexual stimulation , causing them to swell and turn red. 26. "This, " he says, " enhances sexual stimulation if you apply it to your private parts ." 27. PDE5 inhibitors inhibit the degradation of cGMP by PDE5, increasing bloodflow to the penis during sexual stimulation . 28. Young men use methamphetamine for sexual stimulation . 29. What if it would be possible to get the sexual stimulation of intercourse without actually doing it? 30. It doesn't directly cause an erection but boosts the blood flow during sexual stimulation to enhance performance.
