Every man needs this book. Regardless of the state of potency today! And also to every loving woman who cares about the health of her man. And about your own health! Perhaps you all know? And you think that nothing threatens your masculine power! Medical experience shows that even 1 unaccounted or underestimated enemy can change everything! And 17 friends won't help! You can test the genetic strength of male potency donated by parents. Frequently made mistakes. And you can learn from the mistakes of others! And preserve or strengthen the existing opportunities. In any case, everyone makes a choice for themselves and for themselves! Second edition, revised and enlarged.