Does one kern a duplex font?

Hi, this question hit me the other day. I was wondering if some of you had faced this problem before.

Making a regular and bold weight fit into the exact same width is already difficult, but giving them the same kerning values for every pair seems impossible, right? Take a simple `To` for example. The bolder weight won't allow the `o` to "slide" under the horizontal bar of the `T`.

So what do we do? Should we find an in-between "one size fits all" kerning system that works decently for both masters?

Thanks in advance