§ 130.16  Sex offenses; corroboration.
  A  person  shall  not  be convicted of consensual sodomy, or an
attempt to commit the same, or of any  offense  defined  in  this
article of which lack of consent is an element but results solely
from incapacity to consent because of the victim's mental defect,
or mental incapacity, or an attempt to commit the same, solely on
the testimony  of  the  victim,  unsupported  by  other  evidence
tending to:
  (a)  Establish that an attempt was made to engage the victim in
sexual  intercourse,  deviate  sexual  intercourse,   or   sexual
contact, as the case may be, at the time of the occurrence; and
  (b)   Connect  the defendant with the commission of the offense
or attempted offense.
.

(For verification consult Official Text at Senate Gopher site.)