This may sound strange to some, hence please understand it in its proper context. Imam ibn Sirin (Allah have mercy on him) says that the Companion Sayyiduna Abdullah ibn Umar (Allah be pleased with him) would, at times, open his fast with sexual relations [with his wife]. (Related by Tabarani in his Mu’jam al-Kabir with a sound chain of transmission)
Imam Suyuti adds that this means he would engage in sexual intimacy even before eating, and possibly even before offering his Maghrib prayers. This may be so that he is satisfied and able to fully concentrate on his prayers. (Al-Wishah fi Fawa’id al-Nikah) Those married may want to – at least once – act upon this sunna of a Sahabi; but make sure not to delay maghrib for too long, since that is Makruh!!!
روى الطبراني في الكبير بسند حسنه الهيثمي في المجمع عن ابن سيرين قال: ربما أفطر ابن عمر على الجماع.