(Bear with me here, please - I'm totally new to this.)
I've just had my first opportunity to try on some of the sexy lingerie I've bought for myself, but as it happens, I've run into some problems of my own while experimenting. Obviously, compared to a cis-woman I have an extra 'package' I need to hide somewhere in there. Now, just to make this clear: I've no interest in tucking it in to the point where it can't be seen at all. I only intend to dress up at home for the time being, and even if I would go out, I wouldn't be going to the beach anytime soon. (Plus I want to be comfortable, and tucking doesn't sound very comfortable at all. Finally, I just flat out don't mind a bulge at all as long as the rest of me looks feminine enough.)
Still, I'm a bit stumped. Given the premise that I don't want to tuck it in too much, how would I even fit into my panties? I've got some XL panties - not briefs, but not quite G-strings either, so it did look like there is some space there to fit them in. Still though, the only way I seem to be able to fit them in decently enough is if I wear them the "wrong way around" - wider part in front. It isn't so bad that way, although after some time I still feel a bit of unpleasant strain on my testicles; though adjusting my underwear a little can make that go away, at least, it's still a bit of a downer.
So, basically, my questions are - do people actually do this, i.e. wearing the panties reversed? And are my experiences normal for crossdressers or am I doing something wrong? Would getting even bigger sizes help? (XL fits me just fine in male underwear, although I guess that women's underwear wasn't designed to house a penis in it.

) I'd rather not resort to wearing undies with more coverage like briefs, granny panties or whatever. Kind of defeats the point.