The rule of threes enabled Tomas to keep intact his liaisons with some women while continuing to engage in short-term affairs with many others. He was not always understood. The woman who understood him best was Sabina. She was a painter. The reason I like you, she would say to him, is you're the complete opposite of kitsch. In the kingdom of kitsch you would be a monster.
It was Sabina he turned to when he needed to find a job for Tereza in Prague. Following the unwritten rules of erotic friendship, Sabina promised to do everything in her power, and before long she had in fact located a place for Tereza in the darkroom of an illustrated weekly. Although her new job did not require any particular qualifications, it raised her status from waitress to member of the press. When Sabina herself introduced Tereza to everyone on the weekly, Tomas knew he had never had a better friend as a mistress than Sabina.
6
The unwritten contract of erotic friendship stipulated that Tomas should exclude all love from his life. The moment he violated that clause of the contract, his other mistresses would assume inferior status and become ripe for insurrection.
Accordingly, he rented a room for Tereza and her heavy suitcase. He wanted to be able to watch over her, protect her, enjoy her presence, but felt no need to change his way of life. He did not want word to get out that Tereza was sleeping at his place: spending the night together was the corpus delicti of love.
He never spent the night with the others. It was easy enough if he was at their place: he could leave whenever he pleased. It was worse when they were at his and he had to explain that come midnight he would have to drive them home because he was an insomniac and found it impossible to fall asleep in close proximity to another person. Though it was not far from the truth, he never dared tell them the whole truth: