I'm well up for this 4 month thing, personally, but it seems not everyone agrees.

"4 months? 4 MONTHS! Why would anyone want a 4 month orgasm? I'm perfectly happy with the ones I get thanks. If they lasted 4 bloomin months how on earth am I gonna get anything done?
- Alice in Blunderland, Croydon"

http://www.dailymail.co.uk/femail/article-2015805/The-orgasm-lasts-FOUR-months--achieving-involves-keeping-clothes-turning-lights.html