Is experimenting with both sexes necessary to clarify your orientation when questioning it?

I feel like trying both sexes will gain me a much clearer perspective on what my preference is. However, I don’t think I need to go all the way with a guy to know if I am attracted to them or not. I just recently have been questioning my sexuality, probably for the past year. I am sure that I am bisexual, but how do I know if I am a lesbian? I am not physically/sexually attracted to men, but they don’t repulse me or anything. I feel physically/sexually attracted to females. I have never had sex with a guy or a girl. I think the reason why I haven’t is because I have always turned guys down when I get asked out. Since I don’t get into relationships, I have never had the opportunity arise where I could be intimate. Also, I don’t feel that emotional attachment to men either. I can’t see myself wanting them as a companion, because I don’t feel like we are on the same level. I definitely feel an emotional pull to girls though. When I picture myself in a relationship, I see a woman. I can relate to them, they smell better, usually are cleaner etc. I kind of feel put off imagining living with a guy, them leaving the toilet seat up, smelling like cologne. It kind of bothers me. I don’t know how I will ever be sure that I am a lesbian and not just bisexual when I haven’t tried either sexes before. I am so confused.