To be fascinating to men,you need to acquire the habit of discovering and appreciating manliness. If you get into the habit of looking for masculine traits in the men you meet, you will likely not find a single one uninteresting. Manly traits to appreciate include his masculine build, gait, hands, strength and clothing. It also involves his masculine attitudes; protectiveness of you, ambition and assertiveness traits.
You can sincerely welcome even the most tedious of monologues as an opportunity to observe a man's character and to discover his most admirable qualities. Be specific. Be sincere. This gives you a focus when you are interacting with men and gets you away from self-consciousness. You don't have to worry about your appearance or how you are coming across. It won't matter at this point.
Of course, you might discover an unwelcome personality and character too. This is valuable information as well since you need to protect yourself. In any case, you will develop into the most appreciative listener and will invite, quite unconsciously, the confidence of nearly every man you converse with.