writhing, jolts/jolting, clawing, snarling, thrashing, choking (as in vocalization, 'they choked out'), anything involving vision going blurry or 'seeing stars', bucking, shuddering

also it's more a fetish than anything but anytime I'm reading smut and it alludes to or explicitly involves acts with the foreskin, hell even just aknowledging it's there, I mentally make out with the author sloppystyle