Not my act, but a heartwarming one I was told about years back.
It was on my 20th birthday and I went for a mooch down Oxford Street. It was a sunny and very hot day.
I just got out of Charing Cross station and saw a bloke sat in a doorway begging. I said I didn't have any cash on me, but would come back when I did.
I got some money out and bought him a cold water, then went back to find him. He was surprised I'd come back and asked me to sit down and join him, as he liked to chat with folk.
So I sat with him and asked him how he got to be in his predicament. He said he was from Scotland and when he was 17, his mum met a bloke. He clashed with the bloke and after lots of rows, his mum kicked him out, so he fled to London. But money ran out too fast and he found himself on the streets before he could secure any work. He was now 19 and sadly looked way older due to exposure to the outdoors.
He said he met lovely people all the time and that a group of 18 year olds from out of town had befriended him previously and once a month, they would come to London on a night out, find him, invite them back to their Travelodge, let him get a bath, shaved and gave him nice clothes and took him out clubbing, all paid for by them.
They apparently did this as he was a nice lad and they didn't want him to miss out on "being a teenager". I cried hearing this.
That was 22 years ago. I still of the lad and hope he got off the streets.