Just so we're using the same vocabulary, what do you mean when you say "open marriage" ? Do you have romantic relationships with other people, or is your openness restricted to sex? This question isn't intended as a judgement, just clarification so we can understand you better.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker