Freud Was Right/Web Comics

A (not exactly graphic, but still Not Safe For Work) example from Trapped In A Comic. It's all in the hand gestures.
- And even more the immediately subsequent panels from the same sequence.
Holy freudian imagery, Doctor.
The decidedly worrying "autobiographical" side-plots of Kit n Kay Boodle, described by Crush Yiff Destroy as "a storyline involving [the cartoonist], his woman, and his mother-in-law, which, while it may not be entirely true, cannot be read as anything other than a reflection of the author's deepest Freudian issues". The cartoonist's Author Avatar and his girlfriend have sex in front of her mother, and later on the girlfriend's mother has cybersex with the cartoonist's father in front of a chatroom full of their friends.
When Mantis and Raven enter Liquid's mind during The Last Days of Foxhound, they are stunned to find that the metaphor for Liquid's mind is a gigantic skyscraper thrusting up out of an otherwise plain and barren area. (Well, mostly plain, they are standing on a grassy hill just below said skyscraper).

Raven: Wow. Just... wow.
Mantis: Freud would shit his pants.

A Running Gag in Bob and George is the sexually suggestive names of the Mega Man Robot Masters, who include Hard Man (who fists people), Wood Man, Air Man (who sucks and blows), and Junk Man. The Robot Masters are completely oblivious to this, to Mega Man's frustration.
Exterminatus Now gives us the Fleshwyrm, a giant gray worm.

Eastwood: The only thing more phallic would be an actual penis.