Honestly TTYD has a lot of vaguely horny shit in it
Everyone talks about the Hooktail thing but like
You watch Peach take a shower after every chapter
Lady, EVOLVED 
@coriander i checked and there are zero fanworks on AO3 tagged princess peach and paper mario series and showers; really seems like a missed opportunity
@coriander there are in fact only 71 paper mario series explicit fics total
@Lady Like if nothing else that series has the best Bowser writing of all time, how are fanfic writers gonna pass on that?
@coriander @Lady the computer was textually watching iirc
@aescling @coriander i want to read horny fanfic about this!! 
@Lady I mean I think you should play it anyway because it's a great game but if vague Peach voyeurism is what it takes to sell you on it, I'll take what I can get I guess =P