hmm..All the SP's I know get laid frequently, even the ISTP's, as do the NF's.
SJ's, they are like ants..Interpret this how you will. SJ's seem attracted to NF's, and an NF probably wrote the Kama Sutra.
That narrows it down to NT's. But of course, ENTJ's probably get laid more than any other rational put together, due to their natural alpha-tendencies. ENTP's because their humour and spontaneity..My INTP friend is always shagging some girl. Im not sure how, but he does it.
I'd say, out of all the types, INTJ's get laid the least. Mostly because their social disposition, though I think they prefer that "meaningful sex(rare)", rather than that other kind..