Some words to use when writing things:
winking
clenching
pulsing
fluttering
contracting
twitching
sucking
quivering
pulsating
throbbing
beating
thumping
thudding
pounding
humming
palpitate
vibrate
grinding
crushing
hammering
lashing
knocking
driving
thrusting
pushing
force
injecting
filling
dilate
stretching
lingering
expanding
bouncing
reaming
elongate
enlarge
unfolding
yielding
sternly
firmly
tightly
harshly
thoroughly
consistently
precision
accuracy
carefully
demanding
strictly
restriction
meticulously
scrupulously
rigorously
rim
edge
lip
circle
band
encircling
enclosing
surrounding
piercing
curl
lock
twist
coil
spiral
whorl
dip
wet
soak
madly
wildly
noisily
rowdily
rambunctiously
decadent
degenerate
immoral
indulgent
accept
take
invite
nook
indentation
niche
depression
indent
depress
delay
tossing
writhing
flailing
squirming
rolling
wriggling
wiggling
thrashing
struggling
grappling
striving
straining