I am an only child and so is my husband. Actually I was not spoiled. In fact, there were times when my mother went to parent teachers conferences, and it happen to come up (my mother would mention it), the teachers were actually taken aback to find this out. They would tell my mother how surprised they were. I was not what ppl typically picture of an only child. I had no problems sharing, was not spoiled, etc. etc. I hope I don’t sound like I’m bragging chas v’shalom. I’m not. I actually credit my mother for the upbringing.
I don’t believe my husband was spoiled either. He too does not have a problem sharing. As far as him relating to a person of the opposite gender, I just assumed it was a “guy” thing.
Anyway, my kids have always had fun telling friends and teachers that they have NO first cousins, NO aunts or uncles! Although B”H they have a large extended family with whom we are close – 2nd cousins, great aunts and uncles, etc.