If a landlord refuses to rent an apartment to two single women who live together, this is discrimination on the basis of same gender relationships.
This is the term that is used to refer to all forms of bias that may happen due to the beliefs that a person may have.
This is also seen in what they do, their race and the types of religion they have and their ethnicity.
Same gender relationships are the relationships between people of the same gender in the society. Failing to rent them a house because of this is a discrimination based on belief.
Raed more on discrimination here:
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