Girl Friend Experiance.
This means she will moan at you all week long about how crap you are at house work, decorating, earning enough money from your job.
Then she will expect you to take her for a £ 100 meal, during which she will spent 2 hours slagging off her sisters.
then back to her house for no sex, and her moaning about your mates being wankers.
Porn Star Experiance.
Same as above but you end up with a 5 minute half hearted blow job which then turns into a limp wank with the expression 'have you come yet' repeated over and over.
Add BSE - Bad Sex Experience to those, when your punt ends up being with a RBS with CJD