this may be normal seminal fluid (from the prostate). a bowel movement can "milk" a small amount of this fluid from the prostate gland as it passes. assuming you are not having any penile discharge associated with a sexually-transmitted infection or have signs of prostatitis (prostate infection) this should not be an issue.
i frequently have ejaculate discharge from flaccid penis following bowl movement. not involved with arrousal whole wipe. this is not associate with any arousal. notice the leakage of seminal fluid while wiping following a bowl movement. the penis is flaccid and does not change. there is no pain associated with this at all nor ejaculation related feeling. when moving this will result in a small amount of fluid and may happen several times.