Here are a few: One free "quickie" redeemable upon request. One free "fantasy sex night." Whatever you want to try goes! One new sensual act of your choice. Redeemable upon request. Please post more!
one free road head one free show(i.e. you wank it in front of him/her or screw another girl in front of him) one free striptease. come once get one free(fuck him then suck him)
cook your favorite dinner wearing nothing but an apron (or do any other household chore semi-nude or nude... set your limits of course)
No, my then-"girlfriend" made them for me.... We broke up shortly after though, so the ending isn't all that great. But I can still remember it as a fun period in my life, lol.