Originally Posted by lassiter

That is one of the few relatively clear things about this whole mess. The definition is contained in Sec. 2256:

(2) “sexually explicit conduct” means actual or simulated—
(A) sexual intercourse, including genital-genital, oral-genital, anal-genital, or oral-anal, whether between persons of the same or opposite sex;
(B) bestiality;
(C) masturbation;
(D) sadistic or masochistic abuse; or
(E) lascivious exhibition of the genitals or pubic area of any person.

So yeah, spread beaver shots appear to be considered sexually-explicit.