And yeah, it can look like "I don't feel like it" to a casual observer, but then again, it really isn't the casual observer's business. They won't know if it was planned or the result of failed birth control, if the father was/is abusive, and a myriad of other things.
And to be absolutely clear: People would try to tell me "I didn't feel like it" - nevermind that I've never wanted children. I'd have been sterilized years ago if it were readily available and cheap in the US.