Should i tell my dad to stop joking about my hairiness?

Totally just say "dad can you stop saying that about me, it's not that I've low self esteem I'm comfortable in my own skin but I'd rather not have any detail about my body isolated least of all a former insecurity." Or something along those lines, anyway he'll understand as everyone has some kind of insecurity that they don't like to be pointed out

Hairy arms on a woman aren't an issue for me. I mean a woman's arm hairs are not coarse like a man's. It always seems like peach fuz.

A woman's arms typically go unnoticed so whether or not a woman has arm hair doesn't matter. Unless she looks like she is wearing a bigfoot suit on her arms.

You said no one says anything and you get hit on a lot. That means your arm hair is no issue.

Parents often do have a habit of picking at anything they see as "wrong" with their kids. If it were not the arm hair it would be something else.
I do not think you would be out of line asking him to stop making fun of it. Just maybe be civil about it best you can.

Its easy to put others down, then get thin skinned.
what is a put down, if not saying look at the flaw over there.
So you dont notice mine.
Try to ignore it, confront him if needed.
Sounds like a jerk.
But, he might just be playing around and not mean anything by it.
If youre happy with you, as you should be.
Just be you.
BTW, some hair on a girls arms, or small of her back.
Thats a sign of fertility.
maybe thats why hes worried.

My sister n law used to get really upset when I said something about her grey hairs. They have 2 kids and she's about 7-8 years younger than I. She would tell her husband, my brother, to tell me she didn't like my comments.
That being said, have you tried talking to your mom, if she is still around and alive. She could tell your dad how you feel. If not tell him straight out, "dad as a kid that made me feel self conscience enough and I got past it. So why do you insist on bringing up something that caused me emotional pain like it did. I'm an adult now and I'm happy with my body and who.I am, so I would appreciate it if you would stop with the comments about my body. Besides you helped make me that way, so please-stop with the comments or I'm going to stop coming by as often." Or something like that. You could always tell daddy that you forgive him, but to pay him back you are dating a guy that's a crossdresser, (like me). Lol

He sounds so butthurt. I'd love a hairy girl.

I used to bleach my arm hairs, it's actually a pretty cool way to deal with it in my opinion. Next time your dad teases you about it say something like, "I guess I take after you, Dad". Honestly, the more it upsets you when someone teases you the more the person teasing you will do it, even if it's your dumbass dad. If I were you I would confront him about it. Maybe find something he is embarrassed about and pick on him about that if you feel so inclined.

But seriously, I always call people on their bullshit even if it's a member of my family, or a parent. I'm kinda weird like that, but it's because I'm quite mad you know... meh.

To me it sounds like you still are self-conscious. If you were actually comfortable with the way you are then it wouldn't bother you so much that your father jokes with you about, especially if it as rare as you say it is. If it was a daily thing then it would be different, but him doing "once or twice a year" shouldn't be a big deal.

Just have it removed or shave it in the shower when you do your legs. People do notice and it's part of your general hygiene (guys have to shave every day)