On a whim, to help you out, sweetsense, I thought I’d do a search for “suppressed lobster.” That is what you’re looking for, I believe. 
The post that came up is this one:
and here’s an excerpt, a subtle encouragement for you to click the link.
Supressed Smiles & Grins: Trying to shyly conceal arousal with a suppressed grin 
Running Away: Several subjects have gotten up from seats or walked away after too much excitement and arousal was built up!
Thermogenesis: The subject generates a lot of heat from excitement, and starts removing or loosening layers of clothing to compensate
Skin Flush: The face, chest or skin become flushed and very red (blushing to outright lobster red)
Sighing & Deep Breathing: Heavy breathing as if overwhelmed by intense sensations
Fluttering Eyes: Eyes roll back and/or flutter wildly
Fiddling: Playing with jewelry or clothing or fiddling their fingers nonstop to distract attention
Yeah, I know, this info is so valuable you want to rep me, but can’t figure out how. 
Cheers,
Quicksilver
P.S. In case I wasn’t clear, the best info is in the link. The entire thread is full of helpful info.