How long is one erection of your penis?

as long as it can go when i am still young and energetic
再问： Hi,I'm back. That's fantastic that you could always enjoy the sexual pleasure.
再答： haha.you have got another name for Baidu. how are you treating your dick. Glad to have you online so that i won't feel bored. you know i am the only fucking guy to answer you while others are scared away. am i friend enough ?
再问： I've been quite busy these days but I still took good care of it.
再答： good care of it will enable you to have it longer plus a good health. some day i may hope to fall in love with you though i am not a gay.
再问： Are you an expert about that?
再答： well, to live well in this world , i have enough about that as a sort of knowledge, and that is a must as you will soon come to know it as part of life.