Jelly, ice cream, passing parcels

Jelly, ice cream, passing parcels,
trifles, of which I'm not partial
coz my favorite party,
is when you look tarty
and I play on your bouncy castles

Probabilities tend to be thorny

 Probabilities tend to be thorny
when the prospects could prove to be scrawny
Like Australian wickets,
winning lottery tickets,
or the chance of you coming home horny  

There was a young woman called Helen

There was a young woman called Helen,
who had more than her share of choice melons.
Almost everyday
you could hear the chaps say
I'll have a couple of what she is sellin'