BUR #4859 has been approved by @evazion.
create implication double_vaginal -> multiple_vaginal
create implication triple_vaginal -> multiple_vaginal
remove implication double_vaginal -> vaginal
remove implication triple_vaginal -> vaginal
create implication multiple_vaginal -> vaginal
create implication double_anal -> multiple_anal
create implication triple_anal -> multiple_anal
remove implication double_anal -> anal
remove implication triple_anal -> anal
create implication multiple_anal -> anal
There are a few cases that I found like post #2117839 where it's 4(?) vaginal at once, or the count is unclear.
Admittedly this naming kind of conflicts with how we define multiple handjob vs double handjob, for example, but I don't think anyone is going to start tagging orgies as multiple_vaginal, and those names are very confusing to begin with and are not a good way to solve the issue (see the version histories 1 and 2).
If anyone has a better idea on how to name these tags and solve the multiple vs double dilemma please say so.