1. Eating beef, mutton, dog meat and bean products often may make the penis and secondary sexual characteristics develop.

2, pig, sheep, dog testis and placenta, one each, baked and ground, 2 grams each time, twice a day, long-term use has a similar effect.

3. Massage the penis with your fingertips every night before going to bed, or flick the penis with your index finger for 15 minutes each time, or wrap the penis tightly with a warm towel and rub it repeatedly with your hands every night 15 minutes. This is a common self-rehabilitation therapy.