When asked what are the signs of arousal in a man, any girl will immediately answer that it is an erection. However, how to know that a guy wants to make love if you check whether his organ is ready "for work and defense" is not possible.
The ability to have an erection in a man reaches a maximum at about 20 years of age, then it begins to gradually decline. Here are some tips for those who are faced with the problem of reducing potency.