Takes a long time just whispering in their ears while you fuck them. Tell your wife you just get turned on by the thought of her having somebody else fuck her while you watch. Massive turn-on watching another bloke getting a good groping of your wife as you watch. All women will if they feel safe and sure their husbands won't get mad after. Never throw it up in an argument even though she'll push you to call her a slut etc.