Do you have to have sex to get HPV?

The simple answer is no. However, there are many types of HPV (foot and finger warts are HPV created), most of which is handled by the body's immune system. Here's some information from the CDC about it:

http://www.cdc.gov/std/HPV/STDFact-HPV.htm

http://www.cdc.gov/std/hpv/STDFact-HPV-and-men.htm

And here's a good article about the myths and truths of HPV:

http://www.ashastd.org/hpv/hpv_learn_myths.cfm