Because I just can't force my brain to be completely illogical.

If i'm like 30 and have only slept with a few girls in my whole life despite my best efforts, on what basis would it be that I can convince myself that I can sleep with 100 girls in a year? I understand teh sentiment and the 'shoot for the moon' philosophy, but I think it'd be like a business who made 10k in year 1, 9k in year 2, 11k in year 3, and now they aer giving themselves a target to make 13 million in year 4!! - It just seems daft to me