That sounds like misplaced prejudism to me. All the motoring press say the MX-5 is a brilliant car - and I agree. Great value and a great drive. Richard Hammond had one, and Jay Leno - but hey, they don't know anything about cars! ;)
Of course it's up to you if you want to deny yourself the enjoyment that the car can deliver.
p.s. One point to note, it is somewhat difficult to have intercourse in; but it is possible if your wife/girlfriend is a contortionist and/or short. :p