one thing i'll mention while preaching on eternity is will there be sex in the new heavens & new earth? That doggone NARNIAN gets at it again w/ an answer:
I think our present outlook might be like that of a small boy who, on being told that the sexual act was the highest bodily pleasure, should immediately ask whether you ate chocolates at the same time. On receiving the answer no, he might regard absence of chocolates as the chief characteristic of sexuality. In vain would you tell him that the reason why lovers in their carnal raptures don't bother about chocolates is that they have something better to think of. The boy knows chocolate: he does not know the positive thing that excludes it.
We are in the same position. We know the sexual life; we do not know, except in glimpses, the other thing which, in Heaven, will leave no room for it. Hence where fullness awaits us we anticipate loss.