Tags:
balls
bowser
clothing
duo
english text
erection
genitals
handjob
hat
headgear
headwear
heart
humanoid genitalia
humanoid penis
imageboard
koopa
male
male/male
mario (series)
mario and luigi (series)
mask
monochrome
nintendo
penile
penis
popple
rookie (bowser)
Rule34
scalie
sex
shell
spiked shell
spikes
spikes (anatomy)
text
wuffinarts