I don't think theres anything that a man can't say no too. It just depends on the man in question. There are things that I can say no to and there are things that I can't say no to(well not can't, but won't) and those things might be completely different from what you'd say yes or no to.
We're all individuals with individual wants, needs, likes and dislikes so there is no way that there's one thing that all men will be unable to say no to. People commit suicide everyday so you can't say that people will refuse life, there are people who refuse monetary gifts and bribes so you can't say that people can't say no to money. There are people who refuse promotions and appointments so you can't say that there are men who can't say no to power.
There are people who say not to women because they're gay and there are people who say no to women because they simply aren't interested so there's no one thing that every man cannot say no to. We're physically capable of saying no to anything and there's nothing that all men collectively won't say no to.
I imagine that there are alot of men who won't say no to alot of things like money, power and women, but it's not all encompassing, the uniqueness of humans is our individuality and free will, as such we decide what we say no or yes to.
If I were to look at things from a spiritual point of view and following the context of how powerful supreme deities are, then perhaps the only person or thing that we can't say no to is God.
I hope this helps.
I think its difficult for men to say no to the things that their loved one wants. It maybe his family, girlfriend or relatives as long as he is capable of buying/acquiring it, then it will be given. Men normally give importance to the people they value. They allocate their energy, resources and time to the ones they love thats why it is very difficult for them to say no.
I think this is the nature of a man and the reason why we become masculine and dominant over female because we are capable of doing extraordinary things. In return, we give back the things we receive to the ones we value the most.
So for men out there, I salute you for keeping your promise and becoming a man. Though society keeps pushing that men and women are equal. The fact is they are not. They should be treated with utmost care and love from us men.
The man can say NO to what he feels he would not like to do. It is his will, not the will of others. Socially he shouldn't be forced to do what he doesn't want to do. If forced, that would be intimidating. For example, you wouldn't have to say yes to a woman who wants to have sex with him, if he doesn't want to. He wouldn't have to eat or drink anything, if he doesn't want to. A man who is able to respond only because society or social patterns force you to respond in a certain way is a person of little character and personality. Moreover, if a man does not want to embrace, kiss, even live, it is his will, not that of others. And decisions are respected, even though they do not behave
Men are weak when it comes to staying or going out with friends. The one more drink is always a yes and very rarely a no. Most men will just have it because others are having one as well.
A man will rarely say no to sex unless there is sport on. A man will rarely admit to saying he is wrong. This is a very rare occurrence as we are normally right anyway.
Woman, and Money
No one has ever said that starting a business is easy. However, even though you understand that there will be challenges when you first start developing entrepreneurial aspirations, you cannot really be ready to face what's in front of you.
Big boobs combined with a tight firm ass I guess !