1. All He creates has sex: trees, flowers, bees, birds, monkeys, and you.  
2. Everything He says in creating ends with “be fruitful and multiply”. 
3. In Eden He made two perfect mortals and put them in paradise, nude.  
4. Love is His spirit, and it can only come from close intimate connection. 
5. He has parts like a man, and functions like a man. “In His image”.  
6. The angels have sex, and children. There is sex in the 5th dimension.  
Gen 6:2 That the sons of God saw the daughters of men that they were fair;
and they took them wives of all which they chose.
Angels making love to mortals. 
Its not God that is not sexy, its you His corrupted creation that has ruined it,
manipulated it, monopolized it, systemized it to make it adapt to your corrupt world. 
I am not an expert on this subject, but I know the difference between right and wrong, corruption and blessing, religious manipulation and freedom, system bondage and liberty. Mans accepted ways and God’s intended ways. 
The church system has accomplished the restraint and addictions of sex and its abuses, but lacks in the freedom an adult must have. 
As the apostle Paul & Jesus said. “According to your faith be it done unto you, and to the pure all things are pure but to the defiled, nothing is clean”. All things include your sexual life or lack of it . Whatever you choose for your stay here on Earth. (Tit 1:15 Matt 9:29)
The western system has the rules of sex and the right of passage down to a fine art. God bless it for helping the youth to find there way in this traumatic period of there life. They are truly professional at the physical adjustments in life, (child protection, right of passage, restraint and addictions also Medicare and social services) but lacking in the spiritual life. 
As I said, “I am not an expert”. But I know for absolute sure, God endorses sex, He created it and uses it, otherwise we would never have had His son, Yeshua. . 
Some bible verses that show erotic sex and even free love. 
Mark 12:25 For when they shall rise from the dead, they neither marry, nor are given in marriage; but are as the angels which are in heaven. 
Luke 20:34-35 And Jesus answering said unto them, The children of this world marry, and are given in marriage: 35. But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage: Even though the angels have sexual intercourse with each other and even with us mortals, they do not marry. 
There is also cases of multiple wives practiced and accepted in the bible, by great men of God. King 11:3 And he (Solomon) had seven hundred wives, princesses, and three hundred concubines: and his wives turned away his heart. (too many!) 1 Sam 27:3 And David dwelt with Achish at Gath, he and his men, every man with his household, even David with his two wives, Ahinoam the Jezreelitess, and Abigail the Carmelitess, Nabal's wife. 2 Sam 12:24 And David comforted Bathsheba his wife, and went in unto her, and lay with her: and she bare a son, and he called his name Solomon: and the LORD loved him. 
1 Cor 6:12 All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any. Sex is not a sin and never was. The church system is deluded in this doctrine. 
The fact that Yeshua will not receive fornicators or homosexuals into the crystal city is because; 1. Whoever is not saved (possessed by Yeshua) sins against him and the kingdom. Those that are saved are free from the law, those that are not saved are bound by the Laws and every aspect of it, if your unsaved and even look upon a woman to lust after her in your heart you have committed fornication or adultery. 2. When Yeshua lives inside your spirit you do not want to offend your brothers and sisters and you do all things according to the Law of liberty and love. 
So my advise is like Paul’s advise know your freedom in Christ but play their game and have one wife or girlfriend because:
1. We are not in the Holy City yet.
2. We are not even living in Eden here on earth yet.
3. We are in the flesh and it is sinful; it lusts for sensual sex, It lusts for food to the point of obesity. It lusts for all sorts of pleasures that actually mortify your spirit. 
Your life is but a vapour and your flesh is rideled with sinful desires that do not align with the holy spirit. I try to live like the old apostle Paul did... You do what you know Yeshua will appreciate.