The Permanent Booru

Score: 0.228

+ alternate universe	4077
+ blush	1357862
+ booru:e621	1475840
+ breasts	2328745
+ captainjingo	290
+ character:undyne	7011
+ clothing	2723048
+ comic	169226
+ cowgirl position	66602
+ creator:captainjingo	491
+ duo	2031004
+ english text	202488
+ eyepatch	22270
+ eyewear	406949
+ face	970129
+ facial expression	888257
+ fellatio	237489
+ female on top	50461
+ female penetrated	326391
+ fish	39988
+ gender:female	3629343
+ gender:male	3511551
+ genitalia	2327553
+ glasses	295601
+ hair	2359501
+ hair tie	36592
+ hat	285424
+ headgear	345782
+ headwear	332821
+ interspecies	411892
+ language:english	435542
+ male on bottom	47535
+ male on female	272417
+ male penetrating	569075
+ male penetrating female	279960
+ male/female	902785
+ mammal	1302050
+ marine	58519
+ medium:absurd resolution	995347
+ medium:comic	313262
+ medium:english text	668828
+ medium:high resolution	3019380
+ medium:text	1037984
+ medium:very high resolution	36143
+ medium:video game	218021
+ meta:junk tag	332228
+ meta:tagme	288525
+ monster	365003
+ muscles	278025
+ muscular	580011
+ nipples	1630861
+ nude	1713348
+ on bottom	102002
+ on top	136094
+ oral	418864
+ paper	10833
+ penetration	1134948
+ penile	619817
+ ponytail	95396
+ rating:explicit	3735112
+ ride	1029
+ riding	15558
+ series:swapfell	52
+ series:underfell	422
+ series:underswap	269
+ series:undertale	69023
+ series:undertale fanfiction	201
+ sex	1404215
+ sharp teeth	164244
+ smile	1401993
+ species:fish	109490
+ species:human	542844
+ species:mammal	4508551
+ species:marine	179685
+ species:monster	102577
+ species:primate	261495
+ straddling	84786
+ straight	292584
+ swapfell	30
+ tail	1410796
+ teeth	815163
+ text	1219504
+ tied hair	97601
+ underswap	143
+ vagina	1038030
+ vaginal	534763
+ vaginal penetration	441322
+ video games	917085