"Consensual sex" is just sex. To say that implies that there is such a thing as "non consensual sex", which there isn’t. That’s rape. That is what it needs to be called. There is only sex or rape. Do not teach people that rape is just another type of sex. They are two very separate events. You wouldn’t say "breathing swimming" and "non breathing swimming", you say swimming and drowning.
This is a very good point.
This is a terrible point. Sex is the act, not the meaning in it. It is called sexual reproducrion. Sex is used to differentiate from asexual reproduction, like budding.