The new 9.1 simulator with Xcode 7.1 has the feature to simulate a force touch like the iPhone 6s / 6s+ but the option is greyed / disabled.
iOS Simulator > Hardware > Force Touch Pressure [disabled] Screenshot for reference
Anybody know how to enable this option?.
Note: Im testing this on a iPhone 6s simulator
Simulator does not support interaction with iOS Devices using 3D Touch prior to Xcode 7.3. The menu item that you are referencing relates only to Apple Watch devices.