"Now in the case of one raised from the dead to earthly life, the sinful record for which he was condemned to death no longer stands against him. Like one released from imprisonment, he has the opportunity to conform to law. Nevertheless, the resurrected one is still the same human. His death produced no change in him as to personality and sinful inclinations. By resurrection he did not become a perfect human, free from all effects of sin and imperfection inherited from Adam. He was not declared righteous because of dying. As in the case of an ex-convict, he must put forth diligent effort not to succumb to his fleshly weaknesses. He must start in, as it were, where he left off in life and take full advantage of God’s provisions for everlasting life on earth." -- WT 10/1/1974, Questions from Readers, pp. 607-608
So the WT teaches that those who are resurrected will be raised with all the same sinful inclinations and desires they had the moment they died.
This would include not just things sexual but also things like lying, hypocrisy, pride, greed, covetousness, selfish ambition, and the like.
This would seem to me to mean that the millennial kingdom as described by the WT would hardly be a paradise.