2 Sam 6:20 ... one of the vain fellows shamelessly uncovereth himself!
Bible says that would be vain and shameful
2 Sam 13:13 ... and as for thee, thou shalt be as one of the fools in Israel.
Wow you severely butchered and twisted that scripture.
This is what that passage actually says.
But when David returned to bless his household, Michal the daughter of Saul came out to meet David and said, “How the king of Israel distinguished himself today! He uncovered himself today in the eyes of his servants’ maids as one of the foolish ones shamelessly uncovers himself!” So David said to Michal, “ It was before the Lord , who chose me above your father and above all his house, to appoint me ruler over the people of the Lord , over Israel; therefore I will celebrate before the Lord . I will be more lightly esteemed than this and will be humble in my own eyes, but with the maids of whom you have spoken, with them I will be distinguished.” Michal the daughter of Saul had no child to the day of her death.
2 Samuel 6:20-23 NASB
Yes Michal made that accusation and was rebuked for it. And quite harshly for that matter.
This person asked for biblical answer to his preferred life style. And the truth is that there are two arch principles in the Bible to govern us when it comes to these things.
1. Does this action cause us to be tempted to known sin. For example Jesus said if you look upon a woman with lust in your heart you are guilty of sin.
2. do you cause another person to fall into sin. You can use the same quote from Jesus.
The idea is as Paul wrote,
But take care that this liberty of yours does not somehow become a stumbling block to the weak.
1 Corinthians 8:9 NASB
(And yes he is talking about meat sacrificed to idols, the principal, of don't be a stumbling block to your bretheren applies).
So if you answer both these questions with no, and your heart is pure toward God. Then what does the scripture say?
To the pure, all things are pure; but to those who are defiled and unbelieving, nothing is pure, but both their mind and their conscience are defiled. They profess to know God, but by their deeds they deny Him, being detestable and disobedient and worthless for any good deed.
Titus 1:15-16 NASB
You have to judge yourself and decide if what you are doing is actually indulging the flesh or if you are in good conscience and not creating a stumbling block for others.