Hmmm, personally I hate needles, we have to do injection training as part of the mountain rescue cascare qualification, and our medical officer is very keen on us knowing how to inject IM, which means that this year I've had needles stuck in me 4 times more than I needed to.
Now, to sew yourself up would require cojones the size of melons and the tolerance to pain only seen in specialist S&M websites.
Not for me, and not for about 99% of people out there I'm sure
IMHO you're never that far away from an accident and emergency department in the UK, so follow the advice given of elevate the wound and apply pressure, then seek medical help. Let the experts deal with it, they've read books and practiced on oranges to do it, and wear white coats too.
The only bit of advice given to me about suturing is in scalp wounds, where you can lose a frightening amount of blood, as well as scaring the hell out of anyone who's had one. If the wound is clean then a suture can be put in to try to stop/control the bleeding. Interestingly some of the older books recommend using the patient's own hair to pull the edges of the wound together(wouldn't work on me as I'm a baldy bugger!)
Did I mention that I hate needles?