I'm sorry but as a titty-respecter I have to intervene here. Lucas could very well be using socks for what he is afflicted with and how he is coping.
See the lower portion of the "Three-Booby Problem" here for visual reference. These eyes have seen far too much Keffals for me to dig out the images of his specific case.
Thankfully the coomers at /r/tuberous (NSFW! Mournful tits.) we can both see the uncovered phenomenon and learn the name. Well how does this happen?
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Behold, a more lopsided pair of tits than any on the aforementioned subreddit. XX on the left, XY on the right. You can see where the beginnings of these structures exist in males.
However you will also notice they are incredibly denser and have a whole lot more going on in females. To compare it to road construction, both sexes start out clearing the land for the road. Outside of edge cases of gynecomastia, it stops there for XY. It doesn't matter what you do, there's no foundations, pilings, or decks to make the titty-bridge you want. Pubertal hormones may cause some development of the less-dense structures there. Otherwise the XY "breast" consists of the pectoral muscle (non-existent for Lucas) and the "Fatty Connective Tissue" (Keffals has more than too much).
Comparatively you can clearly see that the XY tits have a substantial portion made up of other things. It's what makes them wonderful. For those born XY without surgery, it's a mournful, saggy flesh-tube crammed with fat. This horror-wobbly-sausage is then wrangled/taped in a bra with whatever to make a roughly titty-shaped appearance. It's as clear as day.