The Permanent Booru

Score: 0.234

+ alternate universe	4086
+ ass	1470931
+ blush	1364778
+ booru:e621	1475840
+ butt grab	60486
+ captainjingo	290
+ character:undyne	7015
+ comic	169255
+ creator:captainjingo	492
+ dialogue	577395
+ english text	202576
+ eyewear	407954
+ face	970131
+ facial expression	888259
+ fingering	67147
+ fingering another	7727
+ fingering partner	10164
+ fish	40027
+ gender:female	3643298
+ gender:male	3524499
+ genitalia	2327572
+ gills	9474
+ glasses	296707
+ grabbing ass	46157
+ grin	113083
+ group	577126
+ hair	2365652
+ hand on butt	104206
+ hands on ass	81007
+ interspecies	414010
+ language:english	435542
+ male penetrating	570403
+ mammal	1304436
+ marine	58538
+ medium:absurd resolution	995362
+ medium:comic	313264
+ medium:english text	668830
+ medium:high resolution	3019418
+ medium:speech bubble	203621
+ medium:text	1037988
+ medium:video game	218021
+ meta:dialogue	445215
+ meta:speech bubble	37075
+ monster	365118
+ penetration	1138248
+ rating:explicit	3750754
+ rough sex	18469
+ series:swapfell	52
+ series:underfell	424
+ series:underswap	270
+ series:undertale	69070
+ series:undertale fanfiction	201
+ sex	1409217
+ smile	1406878
+ species:fish	109724
+ species:human	543901
+ species:mammal	4517663
+ species:marine	179687
+ species:monster	102708
+ species:primate	261578
+ speech bubble	287106
+ swapfell	30
+ text	1224461
+ underswap	143
+ vagina	1038046
+ vaginal	537164
+ vaginal penetration	442120
+ video games	917085