Is it weird that i like touching my gf's belly for non sexual reasons?

In the beginning of our relationship i started rubbing my GF's belly, but always on the shirt, not under. (we are both virgins and we plan on keeping that way till we are married) recently i started rubbing her bare belly, (under her shirt) idk why i like it. i know it is not sexual, and she is not pregnant. i do know that i have always liked bellies ever since i was a little kid. she said that she is fine with it, but a little uncomfortable when i go under her shirt.