A couple qualifications too lengthy to include in the meme that I reckon I will be challenged on if I don't state upfront:
1. The "absolute right to choose to have sex" is of course subject to all applicable laws in your jurisdiction, such as not sleeping with underage persons.
2. The point of this meme is that the consent of both parties is the rule in 100% of all sexual encounters. That's holds true in all situations whether they involve a spouse, a porn actor, a one-night-stand, or even a prostitute. Nobody gets to tell a third person to have sex or not have sex. Only the ones whose genitals are involved get to decide that.