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Wings are wings they are pretty I can adopt them.. Its no big don't freak and please don't turn into an angelic cause you got feathery white wings.
Lots of things have wings such as Birds... and other creatures less bird like and just funkey shapes and sizes and saying off the bat that there angel wings IS GOING TO AFFECT HOW THEY APPEAR

If your friend saw the buldges Without you telling him OMG LOOK DUDE I GOT WINGS then it would lead his views a bit more credence. I mean ... people will Look for things that seem to match up to what they expect to see as to buldges I can make my shirt buldge to depending on how I hold my arms... its my shoulder blades sticking out of my back. Sometimes they Really accentuated and Wow its funkey looking but normal.

Did the person you asked to know about your aura know about the wings before hand? Did he know you were bringing these wings out and looked at you knowing before they weren't there and after they were.

See little tiny things like that produce confirmation bias...

You see what you want to see... you see what you expect to see... you see things as you are prepared to see in a light which makes more sence to you. In a light which conforms to prestanding beliefs...

To reject that They were wings and then have it thrown into your face by multiple sources... That is avoiding confirmation bias! hehe
To test peoples perception and be like look at me now just Randomly sporadically and giving them no reference as to what to suspect or believe and them Still getting the same answer though you maybe even told them faulty information that would lead them to believe something else....
hehe
THAT Avoids conformation bias! rofl

And thats part of the reason I hld many of my beliefs... Because damn them... They didn't believe me when I told them they were wrong. Gave me a bunch of info... that they couldn't of known other wise and confirmed things I already knew... and then also added stuff which Other people they had never met has been saying...