I have a female villager who likes 'running' and indeed runs everywhere, making her more efficient at many tasks. I tried to get her to breed in the hope that her children would inherit this useful trait. So she 'goes indoors' - at a run - and has entered the building and come out again before her poor partner can catch up with her.

And she still got pregnant.

you don't have to go into the building to have baby its just for fun.