This may be a controversial viewpoint and I welcome criticism on it. I phrased it as 'sexually successful,' but I think a better way to describe it may be "sexually fulfilled" or "able to fully express their sexuality."

For reasons that make sense only to me, I believe that is necessary to set a bar for what can be deemed sexually successful. That is where a man has undeniable done the things he wanted to do or, more commonly, had the potential to do them but chose not to. This bar should be set at threesomes. Threesomes of a preferred gender are an extremely difficult sex act to orchestrate as a man. A man who is able to pull it off, clearly has the raw attractiveness that makes him inherently high value.

As a brief tangent, it may take some empathy for the opposite gender in order for women to understand this concept for men. Women have no "sexually successful" bar except insofar as getting a man even remotely interested. Take the example of the threesome. Whereas a man could genuinely never remotely achieve this act in his life, a woman could do so in a single night - even an ugly one - and probably get reasonably good-looking, safe partners as well. To this end, women may need to place themselves in men's shoes.

For evidence, I submit that threesomes and other polygamist sex acts are some of the most common "fetishes" men have. Most men explore casual sex as they desire, so a failure to act out this extremely common fetish indicates that they likely simply were unable to obtain it. That is, the man has failed to fully express his sexuality and has not achieved the bar; it would be laughable to call his sexuality and its achievements "successful" when a major act like this is not done. One of the most common "fetishes" that FDS complains of men bringing up is threesomes, something many of them confess to having done but say they would never do again (that it was either not good or they don't want to complicate their serious relationship).

This is not something that is particularly uncommon for girls or guys to participate in. While most girls will not, certainly, the minority of guys who are truly sexually fulfilled will and will have no shortage of girls who are comfortable with it, even though that represents a minority of overall women.

This may also be something that flies over the head of older commentators. Younger generations are far more permissive with this sort of thing and more open about bisexuality in general, especially when in regards to the sexuality of women. It is likely this act was much rarer in the past than it is now, so I ask you to have an open mind if you are older.

Let me know what you guys think or if you'd like me to submit more evidence. I'd love to have my view changed.