If we were to reserve every word that is also used as slang for sexual organs we'd be out a lot of words. Peach, purse, shaft, sheath, tool, pocket, etc, these

If we were to reserve every word that is also used as slang for sexual organs we'd be out a lot of words. Peach, purse, shaft, sheath, tool, pocket, etc, these are all slang as well, yet we still use these for their original meaning. It's all about context. I'd also say 'gash' is quite regional. I've only ever heard it used in the U.K.