Throbbing describes a pulsating effect typically affecting a body part. Causes of throbbing typically involve bodily fluids flowing through the body. This effect commonly applies to male genitalia.

Categories

• throbbing_balls
• throbbing_breasts
• throbbing_bulge
• throbbing_outie_navel
• throbbing_penis
• throbbing_knot

Theme identification

The throb may appear like a spasm, or be more smooth and steady.

- Motion lines, especially tremble spikes, near genitalia.
- Presence of motion onomatopoeia such as "Throb", "Twitch" (conditionally), or "Pulse".
- Physical back and forth movements appearing to be controlled by an internal bodily action.
-- This could be indicated by motion_blur, or animated.

See also

• becoming_erect
• erection