I met this friend about 2 years ago. I love spending time together and we can chat away about everything and anything for hours on end . Quite often she can be smelly though . She has IBS and needs the loo a lot. She showers every day but doesn’t change her trousers or leggings for days and sometimes when she has gone home, the seat where she’s sat is really smelly and I need to clean it. She has close friends who she has known for many years, so they would be in a far better position to have mentioned it if they’d had a problem with it. Can any one think of anything I can do ( either practically to protect the sofa ) or tactfully handle this ? She is such a lovely person, I’d hate to upset or embarrass her but sometimes it’s really noticeable.