Erectile dysfunction is the inability to maintain erection of the penis throughout the sexual act.

 The different types of erectile dysfunction are:

 1. Difficulty in initiating the erection
2. Difficulty in maintaining the erection
3. Soft and flaccid penis which makes it difficult to penetrate inside the vagina
4. Partial penetration of the penis
5. Difficulty in giving strokes
6. The penis becomes smaller inside the vagina making it loose for bothe male and female.
7. Sex is not pleasurable
8. Inability to ejaculate
9. Ejaculatory pleasure is reduced
10. Delayed ejaculation but reduced pleasure
11. Reduction in the size of the penis with erection.

Nervous system in sexual performance.When a man is stimulated sexually the arousal feeling stimulate the brain,endocrine glands,corpora tissue ,testicular glands  and the Corpora spongiosa and corpora cavernosa which get engorged with blood to produce the strong erection of penis .
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