Anywhere that the Resurrected Christ is referred to as "he" and not "it".
But gender is not the same thing as sex.
As for sex, those who think that they would be missing out on something if we don't have a sexuality after the Resurrection are like carefree children who recoil in horror at the idea that one day they won't be able to watch cartoons all day. The child should, if he matures properly, one day discover much greater pleasures than cartoons (such as the companionship of good friends, intellectual pursuits, and yes, sex). Likewise, the greatest pleasures this world and our bodies have to offer us will seem trite and even silly compared to "what God has prepared for those who love Him", which "no eye has seen, no ear has heard, and no mind can conceive."
I have spent thousands of hours studying universalism vs eternal torment vs annihilationism, but I've also spent hundreds studying the issue of romantic love in the afterlife and what I've discovered is that Acts 3:21 is far more important in determining yea or nay than Jesus' words to the Sadducees:
He must remain in heaven until the time comes for God to restore everything, as he promised long ago through his holy prophets.
Mention "no sex or conjugal love" to most Christians who have entered the bliss of marriage and they will groan at the thought. The question is will God really take away something so fundamentally a part of our identity and enjoyed by the average person? If so, why? When I ask people this question, of course they go straight to Matthew 22:30. That's all they have to stand on. But they rarely stop to contemplate what comes before that
Jesus replied, "You are in error because you do not know the Scriptures or the power of God.
Someone please tell me where in the Old Testament God gives any hint that those in the resurrection do not marry. Quite the opposite, Isaiah in 65-66 gives a beautiful picture of life in the resurrection here on a new earth with husbands and wives raising children, tending gardens and enjoying a blissful life in communion with each other and with God
. So if there's nothing there pertaining to the opposite of this picture, then why did Jesus berate them for not understanding something they had no possible way of understanding from having studied the scriptures?
Many scholars believe that Jesus was berating them for
1. their hypocrisy because they didn't even believe in the resurrection
2. their silly example regarding Levirate Law
They say that what Jesus was actually saying to the Sadducees (to paraphrase) was "For in the resurrection they neither marry [in the ridiculous way you have portrayed it] nor are given in marriage [with women being handed off as chattel] but are as the angels in heaven [living immortally and serving the Father]."
I've reads hundreds of comments from people who swoop in to post responses to this innocent question from somebody asking if they will be reunited with their departed spouse or, if they're single, if they'll ever experience the joys of companionship with a special someone in the afterlife and you wouldn't believe how vehemently they try to kill any hope the person has. "Nope. Sorry, Fred. In the resurrection they neither marry nor are given in marriage. So you won't be with Ethel in that way. You two will just be brothers and sisters in Christ." They seem to take a devilish delight in crashing peoples' expectations for being given something so meaningful after we die and go to heaven. In the 60's we would have called these people "hung up" ---serious psychological issues that have warped their sense of how God made sex and romance and partnership and called it "very good" when He was finished with creation and how He plans to restore
everything that was "very good" in the apokatastasis, including romantic love, sex and procreation just as Adam and Eve were doing before the fall. Almost to a tee these people are Fundamentalist and also believe in eternal torment. In a nutshell they are "cosmic killjoys" trying to rob as many people as they can of any hope for doing something really significant and--dare I say it--fun. They portraying God in as bad a light as they possibly can in the process: "Oh, don't worry. You won't miss sex and marriage and having someone special in your afterlife. We'll all be married to Jesus and spend our time sitting around His throne giving thanks and praises to Him 24/7 for alllllllllll eternity." Then they smile when the person's face drops to the floor.