
I get what you are trying to say, but if the "tubes" are cut & tied it is not something that is easily reversed.... Tied = permanent
**If you are squeamish about surgical procedures, you might not want to read further.**
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"Tubes being tied" usually refer to a procedure for used to sterilize women.
"The surgeon makes small incisions in the abdomen and locates the fallopian tubes.
The fallopian tubes are then blocked or cut, preventing eggs from traveling to the uterus.
There are several different techniques that can be used, including ligation, cauterization, or removal of a section of the tubes."
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For men:
1. Conventional Vasectomy:
Involves making two small incisions in the scrotum to access the vas deferens. The vas deferens is cut, sealed, and tied off. *Not easily reversed.
2. No-Scalpel Vasectomy (NSV):
A minimally invasive procedure that does not require any incisions. A special instrument is used to create a small puncture in the scrotum, through which the vas deferens is accessed. The vas deferens is then cut, sealed, and tied off. *Also not easily reversed.
3. Open-Ended Vasectomy:
Similar to conventional vasectomy, but only one end of the vas deferens is cut and sealed. *Allows for the possibility of future reversal.
4. Vas-Clip Vasectomy:
A newer technique that uses a small clip to block the vas deferens instead of cutting it. *Also allows for the possibility of future reversal.
So yes, tubes are technically tied, but afte they are cut &sealed (cauterized).
Sorry.
(=・ω・=)

They are not treated as reversible in real life. They make sure you do not want to reverse it before doing it as it's not guaranteed. As time goes on it's less and less possible to reverse. It can reattach itself but this is highly unlikely post even 1 year of surgery.
This is fiction so I presume the author will do what they want with medical stuff, considering the strawberry milk thing anyway ╮( ̄▽ ̄)╭ so I'm only saying this for real people who think vasectomies are just always reversible - they are not. More often than not. They aren't unless you change your mind within 6 months or so. Over a year, up to 10 and it's basically impossible.
It’s kinda funny and sad that the author had to make him infertile