Sounds like your bf has trained his mind (our biggest sex organ) to respond to an orgasm only one way..... manual stimulation by means of his own hand - and I think the only solution for this issue is for him to stop what he is doing manually so he can give his mind a running chance for change into that of regular intercourse for his orgasms.

One needs to go 30 days for change to take place.... see if he is willing to try.