The 5SOS guys recently dished about it with Live From MTV, with Ashton sadly reporting, "No naked Harry Styles, which is a bit disappointing," adding, "It's a decrease in nudity on the tour this year." We feel your pain.
Nudity decline aside, the 5SOS guys have enjoyed some other perks of being on tour with 1D, as Ashton explained, "We got to go to Europe for the first time and without them [One Direction], we would have never gotten to meet some of the fans, so that was incredible. There's a few more people singing along to our songs, which is nice. That's just a beautiful thing."
As for a One Direction and 5 Seconds of Summer collaboration, don't count on it. Calum explained, "We are two completely different bands," while Luke added, "We might write with them at some point. If we were going to do a song it'd be with someone that's cool and up-and-coming."