Pink when wiping

Tonight when I went to pee before bed, when I wiped I noticed very light pink streaks on the toilet paper. Me and my fiancé did have sex earlier and I was wondering if it could be caused by that? We are pretty sexually active and I’ve never noticed before. I don’t have any symptoms of a UTI so I do not believe that’s what it is. Do you guys think it’s just from sex earlier or something else?