[DannyTN]

So you're saying: Intercourse is sex, sex is gender not intercourse, and gender is grammar not sex.

[MosesKnows]

What I said was:Gender has only to do with grammar and nothing to do with human sex or sexuality

Intercourse is sex - Yes, if you clarify it a bit, sexual intercourse is sex.
sex is gender not intercourse - No, sex is not gender
gender is grammar not sex - Yes