He lifts a rather longsuffering eyebrow at the amused sound, and the second eyebrow joins it at that last comment. He knows what Spike thinks of his sex obsession, but the fact is that sex has always been what his relationship with Ianto has revolved around.
"Thanks for that," he says dryly, but he is actually thinking about the advice, especially since Spike isn't the only one to have brought it up over the last few months. "I suppose I could have a think about what might be a nice surprise for him. We've never exactly dated, after all. Back home, it was pretty much just sex and here - well, here we just kind of move in together right at the start and that was that. I guess it's been a good while since I've surprised him with something nice."
Probably, their 50th day date and night in a hut on the beach was the only and only time, in fact, if he really thinks about it.