When it comes to sex INTJs can have wildly varying views and feelings towards the subject. For them it is either extremely perfunctory, or very passionate and intimate, and this depends on the specific INTJ. For some INTJs it might feel like a means to an end, and even something they dont really need a partner for.

Is Intj good in bed?

Some INTJs can certainly find satisfaction in casual sex, but this comes more from a striclty logical point of view. They can see how engaging in sex with someone will have plenty of health benefits, and they realize that is often a human need.