You do the math
.
Not sure why Maths are necessary?

I have experienced enough faking in the 457hrs of time spent with WGs in the last four and a half years to know when a Girl has Cum.....
It's not an exact science I agree.
Worse stil, in hindsight, it was a crass and unnecessary comment I posted. Apologies for that, but since we are now here, she did indeed Cum hard twice in my hour meeting with her and once in my 30minute meeting.....
Just sayin'

BTW....
In the UK it's Maths not Math

But thanks for your insight....