✔ 最佳答案
Ignore all the nonsense answers here and elsewhere! It definitley causes no diseases, it is in fact absolutely the safest sex you can have. It's normal, healthy and fun and there is more and more evidence of the mental and physical benefits of it. Of course you can donate blood! Masturbation is one of the joys of life for both males and females or all ages. Do it as much as you want without guilt! ENJOY!