They are personal questions, but they give Unreal a context so he can assess your usage and provide suggestions(he is a very knowledgeable guy).
Age gives us a context of where you are likely to be mentally. Are you prone to making rash decisions in general. An older person is less likely to because he should have learned from some of his mistakes. If you are young you might still be developing hormonally and sexually, you should at least understand the potential for trouble like loss of libido, fertility.
A significant other: does she want kids in the future? What if you damage your sexual health, or fertility? How is that going to effect the relationship? You should at least know how to minimise likelihood, of it happening to you.
Do you have kids? If you have had as many children as you want, then steroid usage is less of a problem with fertility. It might be an issue if you want to live long enough to enjoy seeing them grow up, and perhaps have kids of their own. Guys that use heavy are more prone to heart attacks, strokes and other forms of early death.
The amount of guys that get long term libido and impotence issues from 19 Nor drugs like deca, tren is pretty high(just do a search for deca dick). Most of it could have been avoided with the prior knowledge of the risks and how to minimise them, or choose to avoid the compound, and use something else instead.
These are questions that are asked not so we can shame you. They are questions that a responsible steroid user should also ask themselves, because in the end you may potentially have to deal with the problems further down the track(more mg of steroids increases your risk). The power is in your hands, and rather than leave things solely to chance, knowledge will give you more control over your results.
It will be you that has to live with any problems that you might create.
So they are personal questions but they’re not aimed at taking a dig at you personally.