touching the sides
when you have something to eat and it's not satisfying you can describe as not touching the sides, can also be used to refer to a loose orifice
i was banging this girl and it just wasn't touching the sides
It didn't touch the sides
An unfortunate genital mismatch. Either the woman's vagina is too loose or the man's penis is too small/thin, hence 'It didn't touch the sides'. Also used to disparage a woman by suggesting she has been too promiscuous.
I really liked him but when we had sex it didn't touch the sides.