"We kissed" instead of "I kissed them"
"Things got physical" instead of "I chose to go further"
"I kissed them" or "He's making plans to relocate for me" -- that's the preventable shit.
Because doing nonmonogamy WILL laser in on any existing anxieties, issues, or fissures. There's a reason the guip goes "Relationship not working; add more people."
It's not just about catching feelings due to sex or dating behaviour. Humans are feelings-making MACHINES. FEELINGS WILL HAPPEN. If not necessary FOR other people then inside yourself or your partner.
That's trying to treat the symptoms instead of the actual problem.
Okay I am apparently ranted out; hope y'all had a good time.