Yes. I have noticed that many German speakers seem to think "sucker" is a rude word, perhaps because of what it rhymes with, but it's not. It has a long history in the US for "someone who is easily tricked, an easy victim".

It does sound pretty self-depricating though, so careful on that front.

So:

"I'm a sucker for hairy chests"

is not vulgar? :-)

What I want to say is that I have a soft spot for men with hairy chests, but I want to emphasize it more than "soft spot" does in my opinion. Going all gooey-eyed and weak in the knees, y' know? Getting this goofy smile and the saliva dripping from the corners of my mouth...

(OMG, am I blabbering...?)

Well that's a tad vulgar, it's true. But then the topic is vulgar just on its own, so go for it. It's not rude after all.
You could also say: I just love a hairy chest. or A hairy chest really does it for me.

Ich würde das etwa mit "Ich steh' total auf..." gleichsetzen. Also nicht gerade Hochsprache, aber (wenn es nicht gerade um etwas Sexuelles geht) nicht vulgär.

"Wissen Sie, ich steh total auf haarige Männerbrüste!" - na so'n bisschen vulgär ist das aber schon, gell :-) (Aber unterirdisch ordinär auch nicht)

"Sucker" is a totally acceptable word.

Historically, there are many excellent sayings in english: "There is a sucker born every minute".

Of course it does depend on the entire sentence content.

Oh je, vielleich hätte ich die Anfrage lieber anonym stellen sollen, jetzt weiss gleich das ganze Forum Intimes von mir... *LOL*

I imagine all the leo men are critically examining their chests while we women consider where we stand on the issue (I prefer the hairless kind myself.)

*popcorn rauskram* ;-)

As red-blooded heterosexual male, I can honestly say, I do not like hairy-chested women.

dude, I suppose you prefer the heavy-chested, eh?

actually, not really. Once they get into the triple-E range, they seem more like lethal weapons to me and can be rather frightening. :-)

I have one hair on my chest, I am a bear *groar*

That song goes with 3! ;-)

on a playground there grows no grass, hahahaha

Wrong! - lots of grass on my playgrounds.

"I prefer the hairless kind myself." - Marzipanschweinchen ;-)

"Möchte noch jemand ein Eis?" *gg*

To get back to the topic at hand +ahem+.

To proclaim yourself a sucker for something implies allowing yourself to be fooled by something, perhaps even willingly or gladly. "I'm a sucker for a good love story".
I think that's why, for me, being a "sucker" for a hairy chest doesn't quite sound 100% right - what's deceptive about a hairy chest?
But maybe I'm just splitting hairs, ha ha ha.

I guess you could also say being a sucker means turning off your critical faculties, and that could be the effect a hairy chest has on you.

But - there are vulgar connotations of the word sucker. Think about how it is sometimes combined with other words, like one beginning with "c" and ending with "ck". So, to say you are a sucker for something in an erotic context could inadvertantly make it more vulgar by association than in another context.

I can't think of a better phrase, though. To have a weakness for something isn't much better than "soft spot".

"I go ape over a hairy chest." HA HA HA. That's horrible. Don't even think about it.

I'm sure the context is casual (what else??), so it's probably fine.

So, let's play, suckers for soccer: https://youtu.be/Tqge3m_QuHY

Could you do anything with Schwäche, or Faible? Or maybe 'hoffnungslos'?