In deciding whether or not to sharpen someone else's knives I ask myself- am I truly helping someone, or am I just doing someone else's "chores" because they're too lazy to do it, or lean how to do it themselves?
Here is a basic list of people I will sharpen knives for-
Women I want to sleep with (or continue sleeping with).
Adult female family members who I know have no interest in learning to sharpen.
Adult female friends who I know have no interest in learning how to sharpen.
The elderly.
The disabled.
Of course their are limits. I'll sharpen a few knives for someone to fulfill basic knife needs, but I'm not going to sharpen every knife they've ever owned. Sharpening takes time, especially on heavily used/abused knives, I don't own any power sharpening equipment, and I have other things to do with my time.
Here are the people I will NEVER sharpen knives for-
Young, able bodied people, family or otherwise.
Adult, able-bodied men, family or otherwise.
I will however take the time to teach anyone to sharpen their own knives if they really want to learn. I'll even lend them some of my old, used sharpening hones. But if an able-bodied male or young person isn't willing to learn when I'm willing to teach them, screw em, as far as I'm concerned they don't deserve sharp knives.
I look upon an able-bodied young person, or able bodied adult male handing me their knives and asking me to sharpen them the same way I would look upon them handing me a bucket and towel and asking me to wash their car for them, or handing me a new oil filter and asking me to change the oil in their car. Nope, I won't do their chores for them (I will teach them how to change their own oil).
But that's me.