Others have answered your question, but a note regarding the term cis: it's not an acronym, it's just the opposite of "trans". Like the Romans referred to "Cisalpine Gaul" and "Transalpine Gaul" to talk about the two sides of the Alps. So you aren't a CIS man, just a cis man, just as I'm a trans woman and not a TRANS woman.
Others have answered your question, but a note regarding the term cis: it's not an acronym, it's just the opposite of "trans". Like the Romans referred to "Cisalpine Gaul" and "Transalpine Gaul" to talk about the two sides of the Alps. So you aren't a CIS man, just a cis man, just as I'm a trans woman and not a TRANS woman.