The difference between make and female colleagues

So like, I'm currently working at my new company and I noticed this difference with my colleagues and how they talk to me.

At my old job, it was strange. I thought it was established that I youngest in the group and idk anything. It was hard figuring out what I could and could not talk about with colleagues. For instance, I was just trying to create small talk with a male colleague who was old enough to be my father (he's late 50's and I'm 30) since we were alone in the break room. I asked him if he has any siblings and he's like why? Do you like me ? I was taken back and thought that this is not something you should ask.

Fast forward to today at my new work, I told my female colleague that it was my birthday, and how I'd be spending it with family and friends and out of the blue she asked me if I had siblings. I was kind of like taken back because I thought it was a "work no-no" to talk about private matters. And like, we just bonded over the fact that our parents had us in their late 30's.

For a while, now I'm beginning to think that old male colleague was coming on to me while putting me in this oppressive state because I was young and a woman. This guy was so "hot and cold", and kept negging me about my appearances. For instance, I love dressing up and getting my nails done and he had the audacity to tell me that all I'm going to have at the end of the day is a nice wardrobe. At my previous workplace, I felt like I have to "dress down" because of those comments.

This whole ordeal made me realize just how skeevy the whole environment I working at previously. It was never my fault, but more of theirs.