Why is it that people have to comment about the close age gap between Matthew and baby #2 (just under 15 months)?

It all started when I had my routine BT`s done, the pathologists had to make a comment "You think your pregnant , it was obviously unplanned and an accident"

Then last week while on IV fluids recovering from Gastro every Nurse had to make comments, they went along the lines of:

"Was it unplanned?", "Your keen", "Your going to be busy"

I know I`m not the first person to have babies close together and I`m not going to be the last, just why does everyone have to comment like I`ve done the wrong thing and it was all unplanned, far from the truth #2 was planned before I was pregnant with Matthew.

Just wondering you ladies who have had babies close together did you also receive such silly remarks from people on the close age gap and how did you reply to these comments?