I get turned on watching my girlfriend romp with another bloke

Source: thesun.co.uk

A man writes to Dear Deidre about his unconventional sex life, where he gets aroused by watching his long-term partner sleep with another man. They've maintained this setup for five years with the same lover, treating it like a casual friendship to avoid suspicion from their social circle. Deidre responds by exploring whether this dynamic meets their emotional needs and suggests seeking therapy if it's causing doubts.