Let me see if I get your drift.

regular years | porn whore years
18------------| 18
22------------| 27
25------------| 35
30------------| 45
35------------| 60
40------------| 80
40+-----------| Methuselah

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"All my years in p*rn didn't quite prepare me for childbirth. I mistakenly thought all the stretching I did would make this easier."