I loved the 70s when I didn't wear one! I only put a bra back on when the church we were attending at the time preached against it. Yup, I used to be religious back when I lived as a hetero, married woman.
But I HATE bras, and now just wear them so I can "pretend" to be female. But I cut up and redid the bras, wrapping the bottom edge of the bra with fluffy microfiber car wipe cloth material, cut off the hooks and added a long piece of elastic in the back to make them loose, with all back straps wrapped in the fluffy microfiber cloth. I lined the cups with the same material. I suppose I could tackle the straps next, but that would be more trouble.
Besides wearing bras is a bad idea for your breasts.
"The study suggested that wearing a bra from an early age did nothing to help support the chest, reduce back pain or prevent breast sagging. 'Medically, physiologically, anatomically – breasts gain no benefit from being denied gravity. On the contrary, they get saggier with a bra,' Professor Rouillon told France Info in an interview."
Here's Why You Shouldn't Wear A Bra, According To Science via @IFLScience:
http://www.iflscience.com/health-and-medicine/no-bra-day-special-are-bras-bad-you/