Alright people. Let's be real. We all love David Sullivan. He is the nicest of all the humans and he does wonderful things for all of us always. Here are a few important questions you need to ask yourself: 

Is there a man you love more than David Sullivan?
No.

Is his birthday coming up?
Yes.

Does he really want a mountain bike to keep his greek god muscles intact and also because it's fun and great? Yes.

Do you want him to have the nicest bike we can get him (the more we get, the nicer we can do), but also have his lil noggin safe with a bike helmet and fit his chicken legs into some bike shorts too?
Yes. 

Do you want to do whatever you can to help David Sullivan be happy so that his awesome moustache turns into a smile?
Yes.

So donate to this fund right now, and leave him a note or even a haiku about how much you love him when you do, because we're going to get him a mountain bike and he's going to love it, and secondarily love you, which will make your life complete so you can eventually (after many years of a healthy and joyous existence) die happy.

P.S. This is a surprise. Translation: Don't tell him. Bad things happen to people who ruin birthday surprises.