There are several benefits to pumping dick or balls or both.
First, your penis will get bigger, especially in girth. Your dick will hang better and longer and your scrotum will expand, thus allowing balls to hang lower. If you take Damiana and Tongkat ali, your balls will get bigger and, even if you discontinue, some size and better hang will remain.
For cut men, pumping will give some new or newly stretched skin under the glans.You can build on this boinus if you want to do foreskin restoration.
A nice set of pumped genitals will present strong visual appeal, even when you have pants or shorts on.
There is some evidence that pumping the full packagewill enhance erection quality if you are a bit less tha 100% there.
There is also the possibility that pumping will encourage your balls to make more T (add to this taking enough Zinc - but not too much - for an added boost).
And you will feel and indeed be more manly. Your mind will be frequently focussing on your dick and balls. This is no bad thing.
Pumping and ball stretching are addictive, so be ready to want more and more. Since there are only benefits, this addiction will motivate you to keep going.
Theses benefits can also be enhanced if you get some good quality ball weights and stretch, stretch., stretch, for as many hours as you can. The stretching will surely strengthen the ligaments and other tissues and increase your ball hang. Withh all the other benefits mentioned above.
All this is to be done in moderation and taking care not to invite injury or similar bad effects. We are talking years, not months, gents.