I am married and i know the fact that it is haram for a couple to mate during haalat e hayz however I wanted to ask that if my husband comes near and without having intercourse if there comes drop of semen on my body then what is the masael for ghusl. Secondly, when I am not in hayz and in normal condition then without intercourse if a drop or some more amount of semen falls on my body then is ghusl janabat wajib?

The condition for janabat is either:

1) intercourse or
2) getting an orgasm along with secretion of discharge.