[The_Reader_David]

Well, gender is really a grammatical concept, so there are three (for us English speakers, I think the French only have two, and I’m not aware of any language with more than three): masculine, feminine and neuter. Of course, in English we only pay attention to these in personal pronouns (he, she, it; his, hers, its; etc.), for the French every noun has a gender.

There are only two sexes.

[LearsFool]

Well, gender is really a grammatical concept, so there are three ...: masculine, feminine and neuter.

There are only two sexes.

Spot on. Thank you!

To use "gender" when speaking of the sexes is to agree with the nuts who claim that maleness and femaleness are mere social constructs rather than facts of nature. Seems a lot of conservatives have surrendered this battle without firing a shot.