Proud mum cuts her bush into shape of son's face

so the joke takes a moment...

Oh I get it now

I know it's a bit far-fetched and childish...

HElp

Psst vergoona

Pubic topiary.
In fact, the women's division of a razor company made the topiary joke in a national TV ad campaign.

It was like it was shot from the window of a car, showing cookie cutter houses with the same bush in the the yard... except as the VO described the features and benefits of using their razors, the Bush in front of each house was seen to be trimmed into a different shape as it went by.

At the end of the commercial the pan stopped at the last house and the bush was gone. ;)