Our glorified bodies will be perfect. All the women will be beautiful and all the men will be handsome. The perfect age is 25 when anabolism and catabolism are equal and in balance. The gifts that God gives us on earth are but a shadow of what we will experience in Heaven. While some believe that men and women will have platonic brother-sister relationships, I believe that we will be united with our soulmates and experience spritual, emotional and intimate joy and bonding beyond anything in this world. We will be unable to sin; to have sinful thought or to commit sinful deeds. Our minds, bodies and souls will be glorified and perfected. Our most important relationships are with God and with each other. Jesus said that if you remember only one thing, remember to love the Lord your God with all your heart and love one another as love yourself. There are three types of love, eros, filial and agape. All three are united in Heaven.
I don't believe there is any scriptural support for such a statement. God gave his creatures free will; some abuse it, even in heaven; e.g.: Lucifer. So, if angels can sin (and be cast out) why do you think human spirits can't “go bad”?