Manila, April 4 -- The Commission on Elections (Comelec) on Friday ordered Pasig congressional candidate, lawyer Christian Sia, to explain why he used single mothers as butts of his joke during a campaign sortie.

Sia told his audience on Thursday he is willing to sleep with single mothers, who are still menstruating and are lonely, once a year if he is elected.

He proceeded to instruct those who are interested to register for his offer.

"In view of the foregoing, you are hereby ordered to SHOW CAUSE in writing within a non-extendible period of three (3) days from receipt hereof and to explain why a complaint for election offense and/ or a petition for disqualification should not be filed against you," Comelec Task Force on Safeguarding...