Iago, the man obsessed with other people's sex lifes

I don't know what happened to Iago as a child but he must of been slapped by a girl, I know I would of. He hates women, honestly hates them. He can't say a nice thing about them and only views them as a opportunity to screw his lust/love filled friends over. He brings up the nightly activities of all of his female friends at least once per scene.
Also the entire lie Iago tells Othello in Act three is ridiculous (scene 3 lines 411-427). First if Iago has a tooth ache wouldn't he scream or cry out in pain if Cassio kissed his lips "as if to pluck them from the roots"? and what two grown men sleep in the same bed, and why is Iago letting Cassio drape his leg over his thigh. Othello might be a Moor but he should be able to see such a poorly constructed lie.
Also if this had actually happened Iago likes to talk about sex so much it would of been bought up before now.
What a strange man