Three women were discussing safe sex. The first said she
used the pill, the second said she always carried a packet of
condoms and the third said she always used a tin with a few
pebbles inside. The other two looked at her in amazement.
“How does that work?” they asked.
“Oh, it’s easy really. I get the man to stand on the tin and
when I hear the pebbles start to rattle I kick it out from