I do 1 situp every day. In the morning. I have to if I want to get out of bed (or my bed-like-equivalent). That is 365 situps a year (more in a leap year). :P
Every financial year I check myself for Abs.
For security reasons I keep my abs well protected, I mean insulated.
Actually more than 150. It was 1+2+3+....+10 = 55 and it was 3 rounds.