There are strings of some sort, yes, I would agree, Herb.
I always evaluate how the arrangement makes me feel when I am not with her. Do I feel appreciated, cared for, respected outside of our meetings? There are always downsides to each arrangement. People have flaws and rarely check all the boxes we would like them to.
Some of us want more of a hookup, while some of us are looking for something with more of an emotional connection. Some of us are looking for something in between those two poles. Every SB comes to the table with her own expectations and needs as well as emotional baggage, as do we. The evaluation period for me is ongoing.
I try to weigh it out and make decisions when I'm a day or two after the date when my dopamine is in check and not hijacked by the stimulation of lovemaking. I also try not to make hasty decisions when the little head is throbbing.
Do I really LIKE this person, does she seem to enjoy our time together, does she show appreciation of our arrangement both when we are meeting and even when we aren't?
The other consideration is, is there something better than what I have? Realistically, for me, finding a replacement SB of better quality than a current one is a considerable investment of time and energy. It's easy to fall into the grass-is-always-greener mentality, but the fact is for me I know it takes 1-3 months of vetting to find a suitable replacement for my A-List rotation. Good 7's take time to find. [Anything above a 7.5-8 on my scale is a rare find indeed.] And to be sure any new SB is going to come with some downside or drawback.