The Irish repression of sexuality may have its basis in the fact that they have no ass.
I'm sorry to say it but not as sorry as I am that it's true. It's a story from the dark side of a good country.
Of course, one might say that the repression of sexuality in Ireland is derived from the oppressive rule of the Irish version of the Catholic church. And that's true.
Possibly the reason that the ancestors let the church teach them that sex is disgusting is that that's how they really felt about sex with no ass.