The science behind this one is relatively unknown, at least according to my research. But the results are sufficiently notable to merit discussion.
Basically, if you flush once and wait for the symptoms to go away with time, the second drink will usually result in much less flushing.
A lot of people who use this method will commonly have a pre-drink & flush before leaving the house to go out.
Has anyone tried this? Or better yet, have a theory for why this happens?