Okay, this is a little embarrassing to ask, but I had sex with someone right after he smoked "weed". He went out of the room telling me he had tobacco (rolls his own cigarrettes). I guess he tried that first but it didn't work so he smoked the weed. Question is: I had a fast drug test today for a job interview. Could the marijuana he smoked cause me to have a positive test result? I am thinking that maybe it would go into his semen and possibly been absorbed by me???