I had an unfortunate situation in the past, in the act of sex my Kundalini surged upwards, and the girl felt it so strong, she passed out and had convulsions. She woke up a couple of hours after, shaking still. I broke off with her because of that. Scared me to death. I avoid having sex when or if I know for sure the Serpent will be stimulated beyond a point. If the wave of radiation from the tail bone sparks and ignites upwards without too much control, I stop.
And in general bioelectricity and not Serpentine, the other person will feel numbing in their arms and feet, tingling, even little electric discharges when the desire and lust from your part are high enough. The other person during sex and orgasm will feel elevated beyond words and no other comparisons can be made as of other partners. It can become extremely addictive for the other person.