Does a 'sexual relationship' = genital contact, or should there be a broader definition

There must be a broader definition of a ‘sexual relationship’ than simply one involving genital contact. It should also be seen in a wider context than simply homosexual. We can very clearly say that people outside a marriage relationship who are involved in genital contact that is intended to arouse the other person is sinful. There are inevitably less clearly defined areas of sinful behaviour because it must involve the feelings and thoughts of the people involved, not just genital contact. Also there is the question of what is sexual temptation and what is lust? The Accuser often wants to confuse the two.