Now, no good business woman, or any woman (or man!) attracted to power or things that represent reptiles would need a reason to date Frieza; however just in case you are struggling, here are a couple of idea...
1) He is super rich and could afford to buy you everything you wanted.
2) He would spoil you rotten - not because he loves you, but because he wants to show off his money and power (which also means he would only buy expensive gifts - winner!)
3) He's attracted to you, so... let's face it. Do what he says or you die.
4) If you ever get bored he has another 3 forms for you to play with. All different shapes and sizes, hint hint.
5) If you ever want to move house he probably has about a hundred you could go to.
6) He has an ADORABLE son, Kuri-chan! ~*~
7) Living with him you'd get to meet lots of weird and wonderful people from all over the universe!
8) His brother's kind of cute. He's also stronger so if things don't work out with Frieza... y'know. Upgrade.
9) He's a pretty high political figure - head of the Planet Trade Organisation!
10) You would be RESPECTED!
11) You and your family would always be safe from danger, because the only people more powerful than Frieza (aside from Goku) are his family.
12) If you ever got bored he'd take you to see some fireworks.
13) Your mom can never yell at you for having a husband with no money, no ambitions and no power.
14) Even if your mom thought Frieza lacked all of those things she wouldn't dare say it.
15) Your father would NEVER try to beat him up or forbid you to date him.
16) Your kids would never get picked on because all the other kids would be too scared to try it.
17) You would have the most expensive wedding ever and your vein alone would be worth more than Zarbon's hairbrush.
18) You get to vacation (or live!) almost anywhere in the universe because he owns most of it.
19) When he dies you get to OWN most of the universe.
20) His 3rd form has a long tongue. Just saying it might come in handy.
21) You get to meet Zarbon!
22) You get to be the BOSS of Zarbon!
23) Up to a point you also get to be the boss of Vegeta, Nappa and Raditz.
24) You get to watch the Ginyu Force aaaall day.
25) You'll have all the wine you can drink.
26) You'll feel good about yourself...
27) He's a pretty smooth talker.
28) He's experienced as hell at everything political and physical - and let's face it guys, he would SO know what to do in the places that count.