how do u girls pay for your mods?

pretty often i hear guys talking about how they love to mod their girls car. while this is a sweet thought, i'd never let my man do that. i pay for everything that's on my car now as well as everything i plan to do to it. it sucks when i see some girl with a decent car knowing that they don't even have a clue what's on it, they just kinda let their man do what they want to it. i work pretty hard to make my money and put it into my car, and was wondering if this is what u girls do too??