I may be wrong, but I'd imagine oral, oral sex, and maybe penetration, would be implied by the spitroast tag.
While I'm thinking of it, nosebleed should imply blood.

Excellent ideas.

autofellatio -> fellatio, masturbation
autocunniligus -> cunnilingus, masturbation
koopa -> reptile
koopalings -> koopa
evil_grin -> grin
grin -> smile?
grin -> teeth?
fangs -> teeth
sharp_teeth -> teeth (can't recall this implication, but maybe I forgot)
I put a question mark after implication ideas I wasn't very sure about.

Pun's apparent humor implication may be unneeded.
post #183347
post #183348
Macareina is an obvious pun on Macarena, but there is very little to find humorous in them. An interesting situation indeed.