"I don't know what this sex thing is about lady, but I think that the Doctor's TARDIS is a form of transportation. Most likely a quite powerful one." Tyler replied to Sarah in his Proto Man impression. He then refocused on David. "Just as long as it gets us there quickly, it does not matter to me what vehicle we drive in." He said to him. He had a good feeling about this, but he knew that some people would find it weird that Porto Man and the Doctor would have a meal and a chat together, along with a few other people. 

They would have to deal with it, he was too happy to care.