Give consent if you want to.
Refuse if you choose.
Either option is legal, and it is perfectly acceptable for the police to ask for consent. The big disincentive for a warrant-less search is the real possibility of losing any evidence obtained by a bad search.
Everyone talks about hating thieves. Why do some of those same people insist on making police out to be bad when they are trying to catch bank robbers?
Everyone here is a grownup. Make your choices and live with the consequences.
Be safe.