Anecdotes are not data, but I had a vasectomy in my early 30's. We didn't want more kids, and the wife informed me she wasn't planning on taking the pill for the next 25 years.

I wasn't told to "keep it a secret" but equally it wasn't something other men spoke about, so there was some reluctance (on my part) to do it. I, and some others in my cohort of a similar age, though decided to not hide it, but be honest - yes I'm going to be out of work on Tuesday, going for a vasectomy. It did encourage a few folk to come talk about it when it was topical for them.

Men (naturally) have a fear of anything that interferes with their privates. But we do need to be more honest about it - vasectomies are ultimately cheaper, less invasive, and have fewer side effects than other forms of contraception. Yes it is permanent - but if you're ready for that then I encourage you to ask around - you may find others around you have done it, and that it's really not a big deal.

And if you have had it, well, perhaps it's not really something that needs to be a secret. (Especially if you are the first in your social circle to do it.)