I'm pretty sure it has little impact on the Sim you control, it's trying to imitate real life in that if a your gay Sim flirts with a predominantly straight AI Sim of same gender there is less chance if the flirt action being successful. And if a straight Sim you control flirts with an AI of opposite gender that is predominantly gay then that also would lead to more fails. As far as I have ever seen there are no homophobic Sims and everyone has an open mind and is essentially pansexual, they just have a preference or could be bi if the AI math says so. It's not perfect but I think it's pretty good. As for anyone who is offended/upset/disturbed by a gay Sim approaching their straight Sim, my recommendation is an education in how sexuality works. As for people in relationships flirting with others, that happens in the real world and some people take it further in life as well. Sometimes I like to steal a spouse in the Sim world, it's something I have never and would never do in reality so I live the reactions of the spouse!!!
