Anagrams

Mathematical: eleven plus two is the same as twelve plus one, no more, no less.

Philosophical: why such desperation? when just a rope ends it.

Hygienic: Oh, dear! This dormitory is just one big dirty room.

President of the USA Clinton is quite resourceful.  To copulate, he finds interns.

Tsk, tsk! you shouldn't say your mother-in-law is a woman Hitler?