Women are not tempted to sin to the same degree as a man, but they are indeed tempted to sin.  That is, if course, as long as the woman is not frigid.

Women are not tempted to sin to the same degree as a man, but they are indeed tempted to sin.  That is, if course, as long as the woman is not frigid.

And I would go further, still, and say that some women are tempted much more than others, just as some men are tempted much more than others.  Again, not to the same degree as men.

Basically, the provocatively dressed female is telling the man, I am easy.  I described in detail how a man is tempted to sin by the provocative fashions of women.

I ask, how exactly is a Catholic woman tempted to commit mortal sin, what exactly takes place?

I am sorry, LT, but I just can't be as blunt as you... 
I will say that, generally to a lesser degree, women fantasize in the exact same way with exactly the same detail as a man.  Again, some women more than others, if she is not frigid.

And I would go further, still, and say that some women are tempted much more than others, just as some men are tempted much more than others.  Again, not to the same degree as men.

Overall, men should be held to the same (or very similar but as applied to men) standards of modesty as women.  Not only COULD they cause temptations to many, but they should exhibit modesty out of example to everyone else, including women.  If a man runs around shirtless but then rails at women who show a little cleavage, how is that going to strike a woman except as being hypocritical?  Female immodesty is discussed almost ad nauseam but male immodesty not even raised as an issue.  Sounds like a double standard.

I think the idea of women being the same as men as of their sɛҳuąƖ appetites, has been heavily fueled by the pornographic industry.

and by militant feminists.
(You mean, by the pornography industry.)  

More and more you hear of WOMEN being addicted to pornography, so I think that it's beginning to affect them as well.

I think that is more because of decades of feminist indocrination of women wanting to be just like the men (combined with a foolish attempt to please the men themselves which is a contradiction), rather than a natural or biological inclination of women.

Basically, the provocatively dressed female is telling the man, I am easy.  I described in detail how a man is tempted to sin by the provocative fashions of women.

I ask, how exactly is a Catholic woman tempted to commit mortal sin, what exactly takes place?

I think the temptation for women in this regard is more a vanity issue than physical unchastity. Sure, we can see a good looking man and think to ourselves: "wow, what a handsome man". But from that point of simple awareness, to actually "undressing the man in our minds and imagining"... I just don't think it naturally happens. Or maybe it is just me.

What I do remember happening back in my early youth is me instantaneously trying to appear more pretty or even flirtatous, this is, actively seeking attention, when the mentioned good looking young man appeared in the room. It is really an ego issue. If left unchecked, this could lead to sins of vanity or even immodesty.