I am also bi and find genitals in general to be disgusting and harrowing but sometimes the horniness gets the best of me and I manage to get over my urge to vomit
desu i feel like a lot of bisexuals just have the urge to cope and 'join a side' because societally that's what's expected. it feels a lot better to most to have a community backing you, gay or straight.
pussy IS disgusting. it's the natural response to genitals when you're first introduced to them. i found both penises and vaginas to be off-putting, but i learnt to love dick (less so vaginas lol).
but also yeah a lot of gays and straights try to flee into bisexuality sometimes ig.