Let's get real here, shall we? I'm going to tell my friend's husband that it's unethical for him to ride a horse considering his weight.
Do you think it's okay to call out his weight?
I think he should rather choose a better hobby for his size, he could hurt the horse.
I understand your concern, but I don't think you should call out someone's weight like that. You should find a more constructive way to frame your concerns.
I think it's animal cruelty for him to ride a horse. I can't stand the sight of it.
I totally get what you mean, we don't want any horse getting injured. However, maybe bring it up with your friend first instead, so that he could tell his own husband.