My wife still tells me she finds me physically attractive and I exercise regularly to keep fit and stay attractive to her so I know that my appearance isn't the issue.
We've had many discussions about this subject and my wife knows how frustrated I have become but she tells me she just no longer has the interest in sex that she once had.
I'm very honest and open with my communication with her and I've told her many, many times how the loss of her sex drive has made me feel.
I've even gone so far as to ask my wife for an "open" marriage but she said "no way".
Although my frustration with this situation has been getting greater and greater, I still have decided to stay in the marriage (at least for now) because I love my wife and believe that marriage is meant to be a life-long commitment.
In many places, there is a big discrepancy between the laws which exist on the books and what happens in practice.
Depending on the country, various prostitution related activities may be prohibited (where a specific law forbids such activity), decriminalized (where there is no specific law either forbidding or allowing and regulating the activity), or regulated (where a specific law explicitly allows and regulates the activity if certain conditions are met).
But in spite of all these efforts, when I try to initiate sex, my wife participates through the foreplay and then tells me that she just doesn't feel like having sex or is too tired.
She still enjoys kissing and receiving massages from me but that's as far as it goes.
While the policy regarding adult prostitution differs by country, child prostitution is illegal throughout Europe.
Similarly, human trafficking, forced prostitution, and other abusive activities are also prohibited.
So the only solution I have been able to come up with is having a secret affair with either a married woman in a similar situation or a single woman who is open-minded and mature enough to be "the other woman".