I try to understand using of 'to' at the end of this sentence. I understand the meaning but grammar is confusing me. Can someone explain it to me please? I hope I could express myself. I googled but couldn't find anyting. 'songs to dance to', 'songs to make up to' etc, have same construction. Is it about the verbs 'dance' ,' make up','have' or something else that? For me in to's at the end of construction is necessary but obviously I'm wrong but why?
Thanks in advance.