You seem to be saying that their bisexuality feeds into their promiscuity. Is am I correct in reading it this wit d
its the Loneliness of it, they both travel for their jobs, and they dont really have time to settle down and have lasting relationships, so I, personally see that their trying to fill a void with promiscuity. Zevran is from Antiva and was Bought, and was never really given a chance to make any decisions of his own, Isabella is from Rivian and her Husband was a Complete [edit]Monster, they've both been given the chance in their past for experimentation and found they liked it, so Their Bisexual now, and the Lack of ever being in one place long enough for any amount of time has given them a Very Open Personality wise to one night stands because of their lives.