Dozer is almost 6 months old, already 17" tall at the shoulder and 40 lbs (he is pretty lanky except thick neck and shoulders). His dad was on the lean side, tall with a big head and weighs 65 lbs. Mom was a bit taller than average and not heavy at all, about 45 lbs.
I have read about the anesthesia concerns regarding EBD's but it had slipped my mind thinking about neutering procedure, thanks for mentioning it. Humping is not really an issue, he just really likes my wife :D, and I think tried to start on the female neighbor once but I cut him off. Aggressive behavior isn't an issue, he has a really mild disposition when it comes to other dogs and most people. He is pretty smart, only goes into defense mode when it's someone at the door or around the house working he doesn't know and watches me to see how I interact with them. If I'm ok with them he calms down and of course then wants to "meet" them.
We have a 10 year old 15 lb Shih Tzu (Buster) that he thinks is great. They play together and now that Buster has warmed up to him they even nap together often.