You know, according to the old grimoires, there were such practices and similar ones were used even by Aleister Crowley uttering incantations in relation - he, of course, sought support in spheres on opposite poles. As for the summoning of angels, tell us specifically whether for intentional or cognitive purposes you seek contact? If it's just to have a chat, then I advise against it, because here it requires more knowledge so that you won't be fooled when another entity impersonates you and you won't be able to send it back, God forbid, but sexual magic itself is rather performed for the purpose of intention than contact.

Sexual magic is powerful, but are you sure you want to contact an angel in this way? You might want to read about solo practice. Maybe involve your husband and let him be your "angel incarnate"?