On paper, the match does not look particularly impressive.
But they can talk about these differences calmly, take turns initiating, do not treat rejection as a catastrophe, and find plenty of things they genuinely both enjoy.
Now imagine another couple: similar frequency, similar preferences, apparently similar temperaments — yet every conversation about sex ends in hurt feelings, anxiety or conflict.
Which couple is more compatible?
That is exactly why sexual compatibility is difficult to reduce to a simple test of whether two people happen to want the same things.
======================================================================