An old bike

In my younger years money was tight, but that was ok becaiuse nobody had any money.
I used to have an uncle that ran the local scrap yard, so I would go and play there soem days (no health and safety in those days.
I found a number of old bikes with flat tyres, no seats and some wth no brakes, but I borrowed a spanner from my uncle and put together a decent bike, that still had flat tyres.
I took it home and using my dads puncture repair outfit I repaired the punctures, got some 3 in 1 oil and oiled everything up and eventually I got a working bicycle.
So the next day I took my bike out and rode to my uncles scrap yard to show it off.
"Very good" said my uncle "and I have the very thing that you now need"
He disappeared into the next office and came back with a hard hat that miners used to wear, but it also had a visor attached so it was a bit like a crash helmet.
"What is it?" I asked having never seen anything like it before. "Its a welders visor" he answered which made me none the wiser. I put the hat on my head and pulled down the visor, which certainly blocked the bright sun out and it made riding my bike so much easier.
I rode to the local park and as I approached one of the benches I saw a man and woman on the bench, the man was lying on his back and the woman was lying on top of him with her tits out.
I stopped my bike and watched, and the man saw me and shouted "hey kid, do you know what a tit roll is" I shook my head and rode off.I did a lap of the park and as I approached the man and woman she had her head in his lap, I stopped again and the man shouted again "hey kid, do you know what a blow job is?" I shook my head again and rode off.
On m y next circuit I could see that the guy was now sitting on the bench with the woman sitting on his lap with her legs wide open, facing away from him.
I stopped again and saw that the woman was bouncing up and down on the mans lap.
The guy shouted again "hey kid, do you know what a hairy cunt is?"
I said " no, I am not really a welder"