Simple answer is - they are two large things in a position that were not naturally created to be constrained within pants.
Whilst women don't have two large things there!
It's just a case of things getting a bit "awkward" at times!
Just think what would happen if us men didn't re-arrange or scratch.
Have you ever sat on a common fruit variety plum? Now just imagine that being attached to your body as you lower yourself onto it!!!!! Ouch doesn't come close!
Sweat rash can also occur if things stay in the same position for too long. Bedsoars can happen in the most extreme cases. If us men didn't change the placement every so often then things could get a little hot and itchy. We are only making sure we don't cause problems that are so easily over come by a quick fiddle.
Then again the bloke is a very forgetful creature. We just like to be kept reminded that we have them and they are all accounted for. 1, 2, 3 and a 4. All there and we can carry on with whatever it is we are doing.
It is also very pleasureable. If you could have would you just stop weverything and have a wank in the middle of the shopping centre? It would be considered rude so what us blokes do instead is spread the wank out throughout the day. By the time we get home we are ready for yourselves with so much passion that you should be thanking us that we restrained all day instead.
The reason why us men play with their plums is so we can count the number of days/weeks we have gone without sex due to the weight :shock:
only from 50 yards away?????