LOL... neither have I sersiously... mine is purely in jest. Married/not interested/they're too young anyway.
If she's 19 your daughter will love a walk through Camden Market on a Sunday afternoon, a seriously weird & wonderful place! And it's also free.
I know London pretty well. Soon I will be living there. The cable car from Greenwhich to the Olympic park is supposed to be good, you can then have a look around the olympic area. I believe you can pay for that on an Oyster Card. ST James park is obviously free to explore and has lots of wildlife. Many many types of water birds, squirrels, rats. Other parks are very good to. You can find a lot of free live music in London. Not by famous bands so much but still great stuff. Take a look in Camden and Denmark ST for that. Covent Garden is great with lots of street performers. Occasionally some one like Tom Johns or Paul McCartney will turn up, but dont get your hopes to high. A few websites can get you great cheap last minutes theatre tickets. You could go and see a show. If you go to Fulhan Broadway Tube and turn left from the exit you will arrive at Stamford Bridge. Just keep it legal.
I'm a 31 year old man and I also love Camden Market. Very weird yet also very warm and welcoming....full of lovely people. Not many places like that left in London unfortunately.
Technically he is a Ephebophile. *****philia is an attraction to pre pubescent children. A 19 year old will most certainly have reached puberty some time ago.