The fact is that Rip's butthole , like all humans', will smell differently at different times of the day or night. After a nice shower it probably smells of lavender soap. Later it will take on a more pungent and musky odor.
After some heavy squatting and maybe a good, hard dump it will probably be a little stinky. Provided she has wiped - she looks like the type of gal who would - it won't be anything too bad. Of course you can't always be sure as a steady procession of farting (something protein powder can cause..and women DO fart, despite what they say) can have the same effect as a recently dispatched turd.
The trick is to not be put off by the smell..if you put your fingers in and don't feel any turtles, you're good to go.