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John Dehlin is a practicing Mormon … and an outspoken activist for LGBTQ rights. In this touching talk at TEDxUSU, John shares how a friendship with an openly gay coworker changed his views on homosexuality and led him to a career in psychology.

In his research, John looks at the complex, often-prickly relationship between religion and sexuality. Here, he shares some of his findings — heartbreaking statistics about how negative feelings toward sexuality and attempts to “fix” same-sex attraction inspire suicides and teen homelessness.

A quote from iO Tillett Wright’s TEDxWomen talk, “Fifty shades of gay.” 

In 2010, iO started a project called "Self Evident Truths," for which she photographed thousands of people who consider themselves somewhere on the LBGTQ spectrum. iO hoped to show how diverse human sexual identity is, and put a new perspective on what "gay" looks like.

Above, three portraits from Self Evident Truths: Venus, Jamison, and Carrie.

You can read more about the stories behind the portraits at the TED Blog.