Example of an ejaculating dildo with manual syringe control.
Pictured: Strap-on-Me Silicone Cum Dildo.
There are two different types of ejaculating dildos.
The first includes a electronic pump linked to a remote which can be initiated at the user's will, and a mechanical mechanism will automatically shoot the ejaculatory fluid.
The other type of ejaculating dildo is controlled manually. The simulated ejaculatory fluid is stored in the testicular portion of the dildo or in a syringe and is activated by a squeeze. Most models hold about half an ounce of liquid and can easily be filled with a favorite lube or fluid.
Because of the popularity of ejaculating dildos, lubricant designed to simulate cum have also become popular for use with the toys.