If she doesn't buy it and your in a car, blame it on the catalytic converter, the parking brake, or mention that you just drove-by a refinery or a pulp mill. Eventually after she's conditioned you can blast-away at will. You can actually turn farting into a funny thing. Sure she may slap your arm whenever you foul the surroundings, but it won't hurt. Ensure they are dry farts though, as a load of wet poop in the pants can be embarrasing.
Women go wild when ice cubes are used properly.
Don't announce your intentions, but bring a drink with large ice cubes into the bedroom before the lights are turned off. Don't do flowers all the time, only on designated holidays, specifically Valentines Day . If you send the flowers, have then delivered to her at work . She'll flaunt them all day long to her friends and talk about you big time. A dozen long-stems sent to her at work will guarantee you a fulfilling bedroom session, do her that night, even if it's during the week.