I was called a low maintance?

I was not sure how to react... we went to see my boyfriend therapist as he needs to do everymonth, i was waiting in the hall when his doctor called him.
Then he comes out laughing. Im like whats wrong? He goes:"my doctor asked if you are my new girlfriend and i said yeah we 've been together for a while now. Then he asked if i have any kind of addictions or if i mess up his life (!!!) He answered that ofc not im not taking any stuff and also im a good person.
So the doctor then tells him:"thats good she will be cheap for you. Nowadays you need to pay for everything if you want to get sex"
What the hll what that?
What he means im cheap
Thats insulting
I was called a low maintance?
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