I recently had a bit of medical work done and they gave me some "happy juice" (as the nurse lightly put it). I was completely functional. No memory of anything though.
Mrs WBill said that she had to chew on me during the trip home. We live maybe 10 min from the doc's office. I kept giving her the wrong directions on how to get back to our house. Finally, she said "Enough. Cork it!". I replied, "OK" and blissfully went along. :-)
If Mrs WBill had asked you if you wanted a vasectomy during that time and completed the vasectomy before you came back to, would you have felt that you had given legal consent to the procedure?