I think we should be so grateful for an 'afterlight' -if there is any- that we would tolerate everybody else the same gift, and try and use this life to (regardless of an afterlife or not) training to allowing and accepting and forgiving and loving absolutely all people, even mass murderers, the same gift... The churches waiving intolerance about homosexual practice, is not making their members particularly 'fit' for the gift of love (and 'heaven')....
And if the homosexuals have love, or one wants them to have it, then why demand sexual abstinance or sexual practices that may make it more difficult for them to experience love?
If there is an afterlife, I am assuming we will not have physical bodies, so sex as we know it is not likely to exist. Who knows? We will find out when we get there, or not.