I guess the reason there are not many Irish girls in the business is that they were taught by nuns in Catholic schools to be good girls. Mind you, they do have quite a reputation for being very naughty once they escape
I must agree though, an Irish accent is very sexy. As are some of the Scottish accents - Glasgow excluded (sorry to any Glaswegians here).
As to Tiffany retiring in 1996, well that was when she made her last boy-girl movie. Not many of those, all made around the same time. Most of her stuff has been solo or girl-girl, the latest I've found being in 2004. Although Wikipedia says she was born in 1979, other places say 1976 which fits better.
Now she is selling her presence for extortionate prices - see elsewhere in this forum for links. I would guess that Arab visitors to London find her as attractive as we do and are willing to pay for her attention at with plenty of cash. It's a pity she charges so much - she only lives 10 miles from me.