Send them these verses too
Deuteronomy 22:5 ESV / 216 helpful votes
“A woman shall not wear a man’s garment, nor shall a man put on a woman’s cloak, for whoever does these things is an abomination to the Lord your God
1 Corinthians 6:9 ESV / 11 helpful votes
Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality
Romans 1:24-27 ESV / 3 helpful votes
Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves, because they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen
Romans 1:26 ESV / 2 helpful votes
For this reason God gave them up to dishonorable passions. For their women exchanged natural relations for those that are contrary to natural
“He answered, ‘Have you not read that he who created them from the beginning made them male and female
Exactly.