what do mean untie??you can untie something??? there's something like that??

reverse vasectomy is a thing, hence, vasectomy is a must to avoid unwanted pregnancies.

ohhhhhhh i really thought vasectomy is cut through..like the connected veins...

It is but the connection, vas deferens I believe, is just cauterized. The doctor can definitely put them back together again.

ohhh okays thanks a lot..i kinda understand