What is sex without attachment to sense pleasure actually like?

What is sex without attachment to sense pleasure actually like? Does it feel different? Do you only ever have sex to please the other person? I'm asking both about the relationship and the act itself. Clearly, you don't need celibacy to achieve jhana (some zen monks have wives). What is being renounced if we continue to engage in sexual relationships? Would engagement in sex with oneself (only) be proof that one cannot obtain the jhanas? etc.. ---------- > For achieving these absorptions, the overcoming of the five > hindrances [including sensual desire], at least temporarily, is a preliminary condition. It is > especially in the context of achieving the absorptions that the Buddha > often mentions the five hindrances in his discourses.