What's the most common way of describing the fact that the subject matter being talked is overlapping with some other area?
Precisely, what would you say below instead of "bridging on"?
-- Why didn't Jack agree to pave this road with asphalt last Friday?
-- It's a complicated matter bridging on Jack's religious views. Firstly, he can't stand the smell of warm asphalt as it brings back his memories of the negative experience he once had at a construction site when one of his classmates got stuck in warm asphalt and almost died. Another reason is because he considers Friday to be a holy day reserved only for prayer and fasting, but not for work.