opposite sex's

Anybody can say they don't hate the opposite sex as a collective group, just like they can say the same thing of any other group. Saying there is not one member of the opposite sex you met that you didn't like isn't the same thing as saying you hate everybody from that group. Denying that you ever had any negative feelings about somebody of the opposite sex isn't the same thing as honesty, since usually people that would say they never met anybody of the opposite sex they didn't like, not one person, are full of shit. There's always going to be at least one person of the opposite sex or any other group (including the one you're a part of) you never liked, never got along with, or hated, since you met them (and more often than not, more than one). You're going to make a few enemies in life, no matter what group they come from.