This is a strange idea. It does not sound nice.
A better way would be after you are finished, focus on feeling the energy in your body. This is a good time to practice a trance or to practice feeling your life force energy. This is a time for working on yourself.
Afterward when you are clean and when you have all your clothes on, if you are still feeling this soul energy, then you can offer some energy to gods in a respectful way.