Mishi Mboko, the women’s representative for the coastal city of Mombasa, says it was the best strategy to shore up opposition votes.
“Women, this is the strategy you should adopt. It is the best. Deny them sex until they show you their voter’s card,” she said.
The registrations ends on 17 February.
Ms Mboko said sex was a powerful weapon and would encourage reluctant men to rush to register as voters in the exercise that began on Monday.