Why can't the opposite genders be genuinely kind towards each other?

Unless it's a family member or is a job they're getting paid (ex: a bellboy has to carry random people's luggage), there is always a reason when opposite genders are kind towards each other and it's always whenever there is some attraction for the purpose of it eventually leading to a romantic relationship.

For instance if a woman accidentally drops her books, the guy only helps her if he's attracted to her and it's followed by sweet cumpliments. There is always a catch to that. What if she wasn't very attractive, had facial acne and was very overweight? Vice-versa is also true. She won't go all the way of doing him any favor unless she likes him.

Why can both genders help each other out of genuine kindness without hidden agendas? I've helped others whenever I could. I don't have to be attracted towards anyone to help out.

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9 mo
Then obviously someone of the opposite gender being overly nice to the point it's too good to be true aren't genuinely kind for nothing in return. Once you reject them and tell them you don't want a romantic relationship all of the sudden they either turn mean or pretend you don't exist.
Why can't the opposite genders be genuinely kind towards each other?
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