"A woman is like a teabag, you never know how strong she is until she gets in hot water." - Eleanor Roosevelt
Keep your religion out of other people's marriages.
"For what is Evil but Good-tortured by its own hunger and thirst?"
- Khalil Gibran
They are penalized by not having access to Civil Marriage when compared to "Equally-situated couples". In this case that would be law abiding, tax paying, US Citizen, infertile, consenting, non-related, adults in different-sex couples as compared to law abiding, tax paying, US Citizen, infertile, consenting, non-related, adults in same-sex couples.
One set of the above is permitted to Civilly Marry in every State in the Union, the other denied this in most states. They are penalized by not having equal treatment under the law to access the same legal status - which then impact life, liberty and property.