haha, not pagan!
How do you know, smarty pants?
When did it originate?
The triangle is male and circle is female - imagine moving the triangle towards the circle, one enters the other (to be lewd) and there, it's obvious.
There are several things about that that do not make sense, as far as phallic symbolisms go, the triangle is not typical.
It may have to do with...
So you do not know either, yet you are quick to laugh at others who make suggestions.
the shape of the pelvis, to symbols.
Possibly, although men's pelvises are smaller than women's.