Best form of exercise

They say that sex is the best form of exercise.

now correct me if I am wrong

Spoiler:

but 2 minutes and 15 seconds once every 3 months ain't going to shift a beer belly is it?

Spoiler:

now correct me if I am wrong but 2 minutes and 15 seconds once every 3 months ain't going to shift a beer belly is it?

Well it hasn't worked for me!