i have a dirty secret from my past that i never shared with my wife

so ive been married for almost 20 years now and we have this really solid relationship. but there was one thing from before i met her, back when i was just figuring myself out in college. it all started after a breakup with a long-term girlfriend, and i felt lost and confused about my sexuality or whatever. one day i went to an underground club downtown. there were some couples doing swing things, which was really wild for me at the time but kinda turned me on. this one girl caught my eye though, she had these huge tits that looked like they could fill a room. we ended up talking in private and before i knew it, we went to her place. she taught me all these kinky stuff, and let's just say it was a total mindfuck. after that night, i started exploring this side of myself more seriously, playing with other people casually around town. its not like i cheated or anything, but yeah i kept all that hidden until now when shes my wife. i dont know why im confessing this really. just felt like i needed to get it out there somehow after so long.