Just tell her you think about her while you jerk off. Any chick who wouldn't be flattered and turned on by that probably isn't very fun in bed anyway and you can move on.
WooHoo!
My bitch is finally going into her second heat and will be ready to breed very soon. My stud is at the ready--poor guy has been waiting a long time for this gal.
Hopefully in a couple of months I will have baby pictures to post in that lame-ass "My dog is cuter than your dog" thread.
Just thought I'd share the good news...