There doesnt need to be a law for a wrong to have been
committed.
Guys can be raped. And women and men have been sentenced
for rape on guys.
And the Singapore statutes are not some cosmic universal rule of
law.
Get out more.
Guys cannot be raped... period...
Rape can only be committed by a man... its part of the whole rights
to women thing that have a special law to protect women against
sexual assault by men...
The most guys can get is Penal Code Cap 224 Sec 354
Assault or use of criminal force to a person
with intent to outrage 
modesty
(1) Whoever assaults or uses criminal force to any
person, intending to outrage or knowing it to be likely that he
will thereby outrage the modesty of that person, shall be punished with
imprisonment for a term which may extend to 2 years, or with fine,
or with caning, or with any combination of such punishments.
(2) Whoever commits an offence under subsection (1)
against any person under 14 years of age shall be punished with
imprisonment for a term which may extend to 5 years, or with fine,
or with caning, or with any combination of such punishments.
or
Penal code Cap 224 Sec 376
Sexual assault by
penetration
—(1) Any man (A) who —
(a) penetrates, with A’s penis, the anus or mouth of another
person (B); or(b) causes another man (B) to penetrate, with B’s
penis, the anus or mouth of A,
shall be guilty of an offence if B
did not consent to the penetration. (2) Any person (A)
who —
(a) sexually penetrates, with a
part of A’s body (other than A’s penis) or anything else, the
vagina or anus, as the case may be, of another person
(B);(b) causes a man (B) to
penetrate, with B’s penis, the vagina, anus or mouth, as the case
may be, of another person (C); or(c) causes another person (B), to sexually
penetrate, with a part of B’s body (other than B’s penis) or
anything else, the vagina or anus, as the case may be, of any
person including A or B,
shall be guilty of an offence if B did not consent to the
penetration. (3) Subject to subsection (4), a person
who is guilty of an offence under this section shall be punished
with imprisonment for a term which may extend to 20 years, and
shall also be liable to fine or to caning. (4) Whoever
—
(a) in order to commit or to facilitate the commission of an
offence under subsection (1) or (2) ––(i) voluntarily causes hurt
to any person; or(ii) puts any person in fear of death or hurt to
himself or any other person; or(b) commits an offence under
subsection (1) or (2) against a person (B) who is under 14 years of
age,
shall be punished with imprisonment for a term of not less than
8 years and not more than 20 years and shall also be punished with
caning with not less than 12 strokes.
Note: above highlited in orange is
refered to persons of no specific gender....
