“Is it weird in here, or is it just me?” -sw

There are several dating rules that are lay out in order to not "scare" a guy.
Dont talk about babies
Dont talk about Marriage
... maybe don't even joke about these things. As ive said before all things said jokes or not have some truth.(all things said when drinking are full truth (btw))
Lately though ive found myself talking to guys and these topics somehow come up. If i want kids, when and how many comes up. Marriage... joking about wanting to marry me or if im open to marriage atall. I find answering these questions are absolutely futile as you cant exactly plan these things, unless you actually plan them.
Ive come up with a few things on why these topics come up when they are apparently not supposed to:
1) Im "old" enough now that these topics arent taboo and are of importance.
2) Guys have become the ones who think about it too, spec. the older ones.
3) I subconsciously bring it to the surface of the convo indirectly.
All of these are bad.

However id like to think that topics of conversation as you get older are obviously going to change. I either need to actually consider these things, date younger people, or really ask myself if these things are in the back of my mind.
Personally Id rather just answer the questions by saying I cant really give you an answer and wonder in my head what is wrong with this person lol.