Cissexual people feel the sexual anatomy they were born with is right for them and thus do not need to transition. Cissexualism is the opposite of transsexualism.
Some people have suggested Cissexual as opposed to Cisgender because the term is more politically correct. Helen Boyd argues the difference between cisgendered and cissexual by saying that cissexual makes less assumptions about the person's presentation (ie. a crossdresser would be cissexual, but not cisgendered) and their alignment to the trans community in herblog.