Agree. After meeting with a companion I usually send a follow up text to thank him for his time and will indicate if I would like to see him again. In that case, I don't mind hearing from him again. If I I don't indicate a desire to meet again, I will usually indicate such when the companion reaches out to me. In a polite and professional manner, of course.
As a side note, I usually decline to provide a review or a reference if it is the first time we are meeting. Frankly, I don't know the companion well enough at that stage and almost nobody is that good! Unless you're Iron Man - then I really want to play with your suit. Or Captain America - then I really want to play with you; suit or no suit.