Could not resist

R' Michael Broyde on Hirhurim (emphasis mine):

On the 9th of Av, it is prohibited to bathe, anoint, wear leather shoes and have marital relationships…

Indeed, there are numerous Talmudic and post Talmudic sources supporting this understanding of the halacha which makes no distinction between any of these four prohibitions: none are permitted unless one is seriously ill and the violation of the prohibition is part of the cure.

Honey, I am feeling just awful - I know it is Tisha B'Av, but I need to put on some leather, rub you with sweet smelling oils, and give you a good shtup - I think that will make me feel better. That and a hot shower afterwards...