Romans 8
13 For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
So, you say fullfilling the desires of the flesh is good?
Your tirade, aside from being completely against the Bible, shows you have/had this issue on your conscience....
So, what is wrong with lust and masterbation? Well, aside from the fact that it is focusing on self, and not GOD, a lot!
So, what is the purpose of a Christian? To bring glory to God. To point to Him, to have relationship with Him. Lust and masturbation, go hand in hand with this, correct? WRONG!
Those two sins, also, play on one interesting item.... Fantasy. You have a fantistic relationship with a real human, and thus you are living a lie to hold an intimate relationship.
Then there is another aspect.... The seed.
Genesis 38
8 And Judah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.
9 And Onan knew that the seed should not be his; and it came to pass, when he went in unto his brother's wife, that he spilled it on the ground, lest that he should give seed to his brother.
10 And the thing which he did displeased the LORD: wherefore he slew him also.
Oh, and stewardship comes into play because God gave man woman's seed, thus in masturbation, the seed is wasted, and as it is not the man's, he is not being a good steward.
1 Samuel 2
20 And Eli blessed Elkanah and his wife, and said, The LORD give thee seed of this woman for the loan which is lent to the LORD. And they went unto their own home.
And the one verse that proves the father of lies is telling you this?
Matthew 5
28 But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.
Need I go on?