Never Had "Sensitive" Nipples??

So I've NEVER had sensitive nipples... I get literally zero pleasure when my SO (use to try to) stimulate them during sex. They never hurt in the least bit before my periods and haven't hurt AT ALL during my whole pregnacy (currently 38 weeks) Anyhow, I know nipple stimulation can help start labor (I won't try just yet) but I feel like my nipples *can't* be stimulated?? Also.. will this make breastfeeding any different for me? perhaps I won't feel pain from it? Anyone else in similar shoes?