While we have followed this practice, because it makes sense to us, I do want to add a caveat for those with little or no experience who are reading this thread.
There probably will come a time,for the male partner, when there are needs/desires not being met, or anxieties being triggered.
It is essential that the male NOT keep his mouth shut in the effort to give his lady the lead.
Honest, transparent,and clear communication is important.
Your lady has no way of knowing unless you express yourself.
In our case, we were quite happily doing MFM. Initially I thought that I had no real desire for FMF. I have always been a one on one sort. After about a year in I started thinking that it might be fun to try. I kept my mouth shut. It festered for a few months until it started to interfere with enjoying the MFM. The chemistry was being altered.
I said something to my wife. She had noticed something , but was not sure.
Problem solved.
She still has the initiative. She still needs it.
It is better that the initiative is informed initiative.