How to disable foreplay temporarily, the right way?

[mainfct]

I've been trying to figure out if there is an option to disable the foreplay stage for the current scene. I browsed the code and found a bunch of variable related to leadin but I couldn't find a function to call or an argument to pass to disable it. The wiki didn't seem to make mention of that either. Perhaps it's already been asked? Any idea? 

[Ashal]

Only if your using the new make system (wiki guides pending) instead of the old StartSex() system, in which case you can call sslThreadModel.DisableLeadIn(true) before calling StartThread()