Diamondlace The reason we were told to wash our hands as a precaution against Covid was because soap breaks down viruses (not bacteria).
The science of soap
“Soap is a surface-active agent (or surfactant for short),” explains Dan. “These substances are special in that they have a hydrophobic (water-hating) part, as well as a hydrophilic (water-loving) part. We regard these structures has having a ‘head’ (normally the hydrophilic bit), and a ‘tail’ (normally the hydrophobic bit).
“When we mix these molecules with water, they exist in two main forms: either on their own, or in groups, which we call micelles. Micelles are spherical structures within which all of the tails face inwards, away from the water, and all of the heads face outwards, coming into contact with water. If there is enough of the soap, this is the form that it likes the most, as it is the most energetically favourable, and all the parts of the molecule are exactly where they want to be.”
So what happens when these micelles interact with the coronavirus?
“When we look at the structure of the coronavirus in more detail, we see that it is surrounded in a phospholipid layer – a structure which consists of lots of molecules which are not unlike those within soap,” says Dr Corbett.
“In the case of the virus, this coat is actually a bilayer – consisting of two layers of these phospholipids with tails facing in, and heads facing out. When we wash our hands with soap and water, the tails of the soap molecules start to look for an area where there isn’t any water, and as they do so, they start to surround the virus particles. As they continue to move around, the tails can wedge themselves into the virus’ outer layer, trying to get to the bit in the middle, where there is no water. This effect is similar to popping a balloon with a pin. As the soap molecule penetrates into the virus coat, it splits it apart, breaking the virus open, releasing its contents into the surrounding soapy water, which eventually carries them away,” says Dr Corbett.
www.qub.ac.uk/coronavirus/analysis-commentary/how-soap-kills-covid-19-virus/#:~:text=This%20effect%20is%20similar%20to,away%2C%E2%80%9D%20says%20Dr%20Corbett.
I'm not a medic or scientist, but my guess is that soap has little effect on genital bacteria, but the contents of soap could be an irritant.