Is AUTHOR wrong in the post ? POST : hey everyone, i how you're having a pleasant day. tldr at the end. 

so i'm 19 and have been in a relationship for nearly two years now with the girl of my dreams
we fight sometimes but honestly everything has been going great, especially since we're both in weird places in our lives, and have a lot of issues. even through a lot of difficult situations (coming out as trans, cases of irrational jealousy, and many more) we've been there for eachother and i don't regret a minute I've been with her
so anyway she'd been rather down for a couple weeks and i didnt really get why, but yesterday she told me that she would like to try a sort of open relationship possibly involving kinky flirty games, threesomes, and/or sleeping with other people.
i was really surprised and she was really hysterical in the moments leading up to telling me. I'll spare you the details of the conversation we had after about the why/how, but i was supportive as hell and i told her i'd think about it
i'd be lying if i said i hadn't desired other people before, but never thought about acting on it purely because it was only physical and because i didn't want to ruin my awesome relationship (me and gf are also just really good friends, and i know that in the foreseeable future i won't be connecting emotionally with anyone other than her)- so i'm pretty much down to try this but am i the asshole for being gender biased? i can definitely see myself being disturbed by her picking certain guys, but not any girls.. am i the asshole for thinking we should be able to veto each other's 'candidates'?
thanks for your input

L

tdlr: AITA for thinking we should be able to veto each other's possible fuck buddies? AITA because i don't mind the idea of my gf being intimate with girls but i do mind the idea of her being intimate with certain guys? 