Do some clients make you yawn more than others?

I feel so terrible even typing this out, but do you all experience specific clients that make you need to yawn more than usual?? I sadly have one client that somehow keeps provoking this reflex - but not out of boredom! She’s very verbose and engaging and I actually quite look forward to our sessions each week. We laugh a lot and humor is a notable sign of her resilience. I just feel awful that I can’t seem to keep my yawns back. I try to hide them the best I can, but jeez… it’s getting unbearable. The only thing I can possibly think of is that maybe she makes me smile often & perhaps this is a facial position that, when held too long, can trigger a yawn?? I’m at the point where I’m starting to consider physiological triggers lol.

Anyways… has anyone else experienced this phenomenon? I’m trying not to beat myself up, but it’s hard. Very open to tips and tricks to deal with this when it inevitably comes up again in the future… TIA.