When I went dizzy, the doc said that it was caused by the blood rushing to my balls in a preservation mode. and this action starved my head of blood.
So, in this theory:
Your wife has yours in her hand bag. She went dizzy cause her body tried to preserve your nuts.
If you don't get dizzy you don't have anything to preserve.
note: Above mentioned doc may or may not be a real doc or person for that matter.