You have the right to ask for anything you want in a relationship. Are people required to give you everything you ask? Of course not.
Is what your contemplating asking for unreasonable? Some would say yes others no. For me, your described situation wouldn't bother me. But I'm not you. You have to do what makes you feel safe and comfortable.
My wife can't stand to touch or be touched on her (or by) feet because of "cooties". I don't think the same way. Is she being unreasonable asking me not to touch her feet? Perhaps, but I'm willing to accommodate. It's all part of being in a relationship.
Me: 48 - Married, straight, male
Shiela: My wife.
Suzanne: My FWB
Adam: Shiela's LDR