מלכים א א:ב פירוש: רש״י ורלב״ג

Virgin girl. Her virginity warms her flesh.

And be a companion unto him: This means - guard the treasury. And this would be the reason that she could come to lie in his bosom and the man would not feel it.

A warmer. “A warmer,”⁴Koheles 10:9. and similarly, “and he who chops wood will be warmed [יסכן] by them.”⁵Alternatively, סכנת means that she should be “near” to him.—Targum