Taken from The Stir:
1.Because you didn't do the dishes.
2.There is a weird smell coming from your butt.
3.You flirted with the waitress and it made me upset.
4.I feel fat and I am so not in the mood.
5.I have B.O. so I don't want you near me.
6.You have B.O. and I don't want you near me.
7.I didn't brush my teeth.
8.It smells like you didn't brush your teeth.
9.You aren't paying enough attention to foreplay.
10.I really don't want to give you a blowjob and I know that's what you like first and I just. can't. do. it.
11.Because I don't want to do it the minute you walk in the door like you expect.
12.Because you've been a pervert all day and it's annoying.
13.I'm hungry -- and not for sex.
14.Because I'm tired.
15.Because groping doesn't turn me on.
16.You're drunk and I'm not.
17.I don't feel sexy.
18.Because I have no interest in sex at all.
19.I slept with someone else earlier in the day.
20.I just want to be alone.
21.Everyone's been up my ass all day, the kid, the dog, the cat, I don't want you there, too.
22.Because you're being an asshole.
23.Because you're being rough in a mean way.
24.I masturbated today. I've had enough.
25.Because I can't orgasm and I don't feel like faking it right now.
26.Because you aren't hard and I'm tired of trying.
27.Because loafing around the house in your boxers while you scratch your balls doesn't make me hot.
28.I'm on my period.
29.Because I wish the time you just spent playing your Xbox you were playing with me instead.
30.Because you don't want to do it how I want and I don't feel like explaining.
31.I fantasized about an ex today. I can't do it with you right now.
32.Because I'm cranky.
33.Five minutes ago you were basically ignoring me. Now you want to have sex? No.
34.Because I just showered and don't want to get dirty.
35.Because I don't think you love me.