As a place to perch goes it can't be that comfortable, although the two doves seem happy enough there does seem to be a little bit of an atmosphere; well the body language doesn't look that great between these two doves.
Never mind, it's a vantage point and the only other birds that seem to use the top of the pole as a perch and a vantage point are the resident sparrow hawks and kestrels so maybe these two are enjoying a little adrenalin rush and looking both ways.
The trouble is you can't see the sparrow hawk in the sun.