Um, it depends how many hands the reader will devote to holding your book.
Suggest you go read other
recent books in your genre. You'll find - for example - that a sprinkling of explicit scenes would be unremarkable in modern mainstream fiction, chick lit and romance.
My understanding is that your agent or editor wouldn't be put off if you went "too far" for your market, but they might ask you to tone it down. This is a commercial, not artistic, decision.