A wife asks her husband, "Could you please go shopping for me and buy one carton of milk, and if they have avocados, get six."
A short time later the husband comes back with six cartons of milk.
The wife asks him, "Why did you buy six cartons of milk?"
He replied, "They had avocados."
Even when you're talking about the same thing, you can be talking about different things. Be explicit in your communication. Especially be explicit in your sexual communication.