You know, he's a very private person - he'll probably kill me for telling you about this!
[Not that that would exactly be a permanent problem, in this case... Whatever, the urge to tell is there now, thanks to all those yummy pastries and the fantastic coffee he's been drinking!]
Okay, well, he basically seduced me. He needed to get a job at Torchwood Three so he could hide his Cyberman girlfriend in the basement and try to use our facilities to fix her, so he seduced me. By catching me a pteradactyl.