Delgado was neutered at 10 months, it really hasn't affected him in any way so I wouldn't worry too much about it
There are inflatable cones that may help, or he can wear mens boxer shorts or a tshirt to cover the area but still keep him comfortable. Or a combination of boxers with a cone, whatever works. You really don't want him messing around the sutures and causing issues, complications are not nice to deal with not to mention can be extremely expensive.
Continue with the pain meds as prescribed, even if he's not showing pain that doesn't mean he's not experiencing it.
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010