RIOTA - In 1 Corinthians 11:14-15 this saying:
14 Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him?
15 But if a woman have long hair, it is a glory to her: for her hair is given her for a covering
Why is it in CHURCH, JESUS CHRIST has a long Hair? And for as we know that Paul spoke here and Paul is always with Jesus on his Ministry?

JOEL - Actually Paul never did see Jesus in person while He was on the earth; although he did see Him once in a vision when the resurrected Christ appeared to him(Acts 9:3-6).
In the scriptures you refer to Paul is not speaking of items of doctrine or ordinances, he is merely talking about an old Jewish custom that he believed should continue in the church and He appeals to the generally observed difference that women can grow longer hair than men, thus God intended it by nature. If God intended it by nature, then He gave it to her for a covering.
But Jesus never said anything about this while He was on the earth. Nobody really knows exactly what Jesus looked like(except for maybe a few prophets) during his life on earth. Paintings of Him are purly an expression of a particular artist's opinion of what most Jewish men might have looked like at that time.