Unlikely...unless he literally had it ON his penis. Esp if he had it on it and you gave him oral.
BTW, if you don't use, why did you have to do UA?
Was the specimen tested in a lab or just a dip? If in a lab was it tested further for verification? Have you been in hospital and given medications? Smoked weed?
I'm a Substance Use Counselor. Yours is a story I've heard before. Did you test pos for anything else? Did use anything else? There are multiple ways you could have been positive. Do you know what the metabolite level was! Have you been taking other medications? Energy drinks? See chart below for some over the counter and prescription drugs that can produce false positives. Just remember it does not happen often.