Thread is about "People you know you shouldn't want to shag, but you would anyway!"
You all give examples of people you like to shag ignoring the "you know you shouldn't want to" part

There is nothing wrong wanting to shag escorts, newsreaders, actresses, ex miss World etc ...
If you cannot ... there is another story ... but you definitely should try if you have a chance.

From my own understanding, "you know you shouldn't want to" part is referring to dangerous but very attractive people, wifes/husbands of your mates etc ... somewhere where is risk or guilt involved.