Meh. I'm not far behind you in age and I still read comics, play games, build Gundam models and buy occasional action figures.
I'm not sure why your girlfriend would jump straight to having "childhood issues". I don't know you, obviously, but I'd imagine it's more just waxing nostalgic than having mental issues. Other than that, Lego sets are just fun to build.
Lego's are toys, yes, but the work that goes into them makes them no less relevant to a "normal adult" than a jigsaw puzzle. Build those bricks proudly!
I'm not sure why your girlfriend would jump straight to having "childhood issues". I don't know you, obviously, but I'd imagine it's more just waxing nostalgic than having mental issues. Other than that, Lego sets are just fun to build.
Lego's are toys, yes, but the work that goes into them makes them no less relevant to a "normal adult" than a jigsaw puzzle. Build those bricks proudly!